Obayed_Ullah_EDSC5029_Assess 2_Draft
docx
keyboard_arrow_up
School
Curtin University *
*We aren’t endorsed by this school
Course
EDSC5029
Subject
Chemistry
Date
Dec 6, 2023
Type
docx
Pages
10
Uploaded by DukeNeutronBison33
Unit Code: EDSC5029
Unit Name: Secondary Professional Experience 1: Planning
Uni Term 2, 2023, Bentley Campus FO [2]
Assessment 2
Assessment Report
Student Name: Mohammad Obayed Ullah
Unit Coordinator Name: Dr Bich Nguyen
Assignment Due Date: August 26, 2023
Word Count: 2101
1. Introduction
A teacher must track students' learning progress in the classroom through assessment.
Assessment is a systematic measure of student success and progress in curriculum throughout
the learning journey in the school. The choice of assessment types depends on the set goal
and overall curriculum objective (Hassan, 2011). A formative assessment designed with
multiple choice questions (MCQ) and short response questions targeting Year 11 VCE
chemistry is well aligned with the curriculum (VCCA), specifically the topic of oxidation and
reduction reaction and their impact on society. This assessment will inform the progress of
the student's learning, particularly subject numeracy, literacy and content knowledge, which
will form the basis of future teaching. In addition, it will provide feedback to both teacher and
student as well as provide better opportunities for students to master the curriculum
objectives (Brady & Kennedy, 2012).
2. Designing the assessment task
This assessment was designed in consultation, collaboration and participation with my
mentor teacher and aligned with the content descriptor of the VCCA chemistry curriculum.
To be a master in the focused area of VCE chemistry, students need to practice and learn
subject numeracy, literacy and the theoretical concept of the chemistry topic. This formative
assessment aligns with the behaviourist theory of learning together with Bloom’s Mastery of
Learning approach, which is a traditional in type. Based on the curriculum content and its
nature, it requires students to practice a few skills to develop them and build an understanding
of them. This aims to develop new skills and build awareness, improving competence and
helping students achieve mastery (Hattie, 2008; James, 2006). In this particular focus of
chemistry curriculum, students need to practice several examples of mathematical formulas
and calculations by taking different examples to become masters on how to follow the set
rules and steps to successfully solve the problems. To do this, the tasks need to be broken into
several parts so that they can be learnt by frequent practices. After mastering each of these
parts or components, the complex task needs to be rebuilt (James, 2006). In such a scenario,
memorisation of information and facts and the formation of habit allows students to
successfully learn and accumulate skills, particularly in this focus area. This assessment aims
to identify how far students could practice and master certain subject numeracy and
calculation through short response questions and MCQ. Mainly, MCQ is an excellent tool to
improve students' learning experience through the diagnosis of the perception of students in
their quality of learning (Velan et al., 2008). In addition, this assessment will be used as a tool
to identify whether students need more practice or not based on either correct or incorrect and
poor performance. It will signal whether a teacher should go back to teach more basic skills
(James, 2006). These conventional assessments help students by making them aware of what
they have learned and where they need to focus to improve (Weurlander et al., 2012).
An assessment needs to fulfil the principle of assessment for an accurate outcome. That is
why it needs to be aligned with the teaching, learning and curriculum content knowledge to
be valid, as outlined in the literatures (Brady & Kennedy, 2012; McMillan, 2014). This
aseesment was aligned to the focuse area of VCCA chemistry and covered the content
knowledge. Clear instruction as well as marking criteria for the student are an important
component for a valid and fair assessment (McMillan, 2014) which was also covered in the
assessment. In addition, inclusion of both qualitative and quantitative components in the
assessment contributing to the validity and fairness of the assessment (Hassan, 2011).
Bloom’s Mastery Learning Approach recommend that the understanding, skills, abilities and
interests of individual student need to be catered in the form of differentitation (Hattie, 2008;
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
- Access to all documents
- Unlimited textbook solutions
- 24/7 expert homework help
McMillan, 2014). Including different level of MCQ and types of questions such as short
response question provides the opportunity of measuring individual student performance
which will be the basis of implementing personalised learning strategies (Appendix …).
Furthermore providing differentiated instruction about key important components and tasks
as well as providing scaffolding such as prompts, formula table and data table will maximize
the learning of students and the validity and fairness of the assessment (Hattie, 2008). 3. Implementation of assessment
The assessment was implemented through McMillan (2014) approach where the prior
knowledge of the subject were gauged by asking few quick questions following by providing
information on the focused curriculum establish a connection between prior knowledge and
current content knowledge. Explicit explanation on the topic was provided as part of gradual
release of responsibilities (McVee et al., 2019). Scaffolding is an option available for the
students requiring additional support to encourage further development and student led
activity on the task and problem were completed prior to the implementation of the
assessment (McMillan, 2014). In addition, prompts, cheat sheet, access to ICT, data table and
periodic table as well as selective seating arrangement were provided so that students with
differentiated needs can be catered durimg the assessment (McMillan, 2014). Furthermore,
sufficient time allocation based on individual student needs was considered during the
implementation of the assessment in the classroom (Hattie, 2008; McMillan, 2014).
4. Marking, moderation and reporting:
The student responses were marked based on the assessment rubric which was analytic in
nature although there are component of check list. For example, the MCQ part were marked
on the basis of correct answer but the short response questions were broken into different
components to mark accordingly (Appendix….. ). Research outlined that the purpose of
rubric is to assess the performance of student and their level of mastery in the topic
(Brookhart, 2013).
Brady and Kennedy (2012) outlined that it is important to consider student progress and
performance during the design of marking criteria such as analytical rubric which is in
conformity with the AITSL standard 5.2 (AITSL, 2017) as well. Each student was given a
rubric with similar example of work (Appendix…) where all the component were broken into
different elements with allocated marks. This analytical rubric can help student in learning
by describing the criteria and expectation of learning (Brookhart, 2013). Furthermore, student
can empower themselves to take the responsibility of their own learning from the appropriate
instruction in the marking criteria through self-reflection, indentificaiton of the area to
improve and asking feedback (Brookhart, 2013; McMillan, 2014).
Prior to the delivery of the assessment, an internal moderation together with a mentor teacher
was conducted to comply with the assessment principles and AITSL standard 5.3. so that the
assessment can meet the standard of reliability, validity, fairness and inclusivity
(Appendix ..). Aalignment of the chemistry curriculum, marking criteria, rubric and student
performance were taken into consideration during the moderation process to ensure
consistency and comparability of judgement as outlined in the literature (Klenowski & Wyatt-
Smith, 2013). In addition, the assessment was moderated in a way that it aligned with the
school’s assessment policy, maintaion the principles of assessment. My mentor teacher reviewed the assessment as part of the post moderation by checking
randomly selected few of the assessments attended by low achievers, at achieve and high
achievers considering the involvement of teacher meeting and internal moderation practices
to find how best support student in learning within the teacher standard as outlined in the
literature (Klenowski & Wyatt-Smith, 2013; McMillan, 2014). We justified the marks based
on the quality of task and performance as evident from the assessment while refereeing back
to the marking sheet (for MCQ) and analytical rubric (for short response questions)
(Appendix ) discussed the quality of the evidence identified in students answers to justify
grades given to students while referring back to the analytical rubric. This mode of
professional interaction enables us to align our understanding of rubric components and
criteria, fostering a general agreement on assessed work quality. This process results a range
of recommendations to improve the instructions, consistency in judgement, work quality,
reliability and area to focus for the improvement (Appendix ..). For example, the instruction
in the analytical rubric need to be more specific and explicit for student with different
abilities, which ultimately support teacher to implement and deliver a valid, fair and reliable
assessment assisting student in achieving success (Klenowski & Wyatt-Smith, 2013). As outlined in research, personalised and specific instructional support should be the main
component of an effective feedback (Hattie, 2012; McMillan, 2014). This entails customizing
responses to help students pinpoint key improvement areas, including the task, process, self-
regulation, and self-feedback (Appendix ..). Verbal feedback, in the form of questions and
suggestions, was given to selected students requiring extra support to meet success criteria
(Hattie, 2012). Post-assessment involves communication with parents other stakeholders as a
process of reporting outlined in AITSL standard 5.5 to be reliable, fair and accurate (AITSL,
2017). Accordingy to Brady and Kennedy (2012), the process of reporting involve
comprehensive and specific information on students achievement together with transperant
and effective communication with other stakeholders. Note has been taken on the assessment
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
- Access to all documents
- Unlimited textbook solutions
- 24/7 expert homework help
of individual students to provide further feedback to families on student achievement and
progress during parent-teacher interviews.
5. Reflection on practice
Reflectiont process which was started through post-moderation is a important tools for a
teacher to review, rethink, accumulate edivence and data, compare the cumulative edivence
and data to ensure the entire process of assessment is valid, rilable and fair. In fact it is an
important practice to comply with the AITSL standard 5.4 (AITSL, 2017) through the
identification of the trend and pattern of student learning using a range of data, evidence and
information collected from the assessment. It will provide a teacher the opportunity to reflect
on what worked well and what not, to pinpoint the key area to focuse for the improvement
through specific and differentiated pedagogical and teaching stretegies (Jennings, 2019). The
data were collected in a table with two major section as the assessment was designed with
both MCQ and short response questions (Appendix…). As the aim and goal of these two
sections were different, the evidence from the MCQ section inform the level of subject
neumeracy learning where as the short response question tell us more about the masgtery
level of content knowledge and critical thinking. The collected data were analysed and
identified a few patterns and correlations among the students throung a process of
brainstorming considering the applied teaching strategies, instructions style, students group,
learning preferences and assessment types (Jennings, 2019; McMillan, 2014).
The cumulative data and evidence clearly identify that most of the students were achieving
low in the content area where the skills and mastery of subject numeracy in the key to
become successful although during the classroom quizzes the trend of success were different.
That is why it is crucially important that a teacher mind is broad and use a range of data such
as students performance pattern, classroom responses, previous assement result and any
special circumstances need to be consider as well as teacher is well aware of how the
parameters (for example; numeracy or critical thinking) are comparing to come to a
conclusion. For example; if a presious assessment result were taken into consideration in this
case, then it is very important to ensure that this particular assement was also focuesed on
evaluating numeracy skills. Otherwise the interpretation could lead to a wrong conclusion
(Jennings, 2019). However, the data need to be reliable and should be collected from a range
of sources to conclude and to pinpoint the area to focuse and to design further teaching
strategies accordingly. In addition, the data also provided with the correlation between subject
numeracy and critical thinking skills of the students. Most of the student who were low
achiever in subject numeracy also follow the same in the section of the short response
questions where critical thinking is the key to be successful. I believe, the key diagnosis is
that the neumeracy skills on the content knowledge need to be improved through specific
teaching strategies such as scaffolding and practicle over and over on the similar problems.
The short response question provided the evidence of critical thinking skills among the
students which is surprisingly below in compare to the performance in the classroom during
the content delivery. Effective strategies need to address this issue are outlined from the
evidence of the student performance is further explicit instruction on the same topic.
Furthermore, breaking down the task into more steps to reduce the cognitive load. For
example, several steps are introduced to writre a chemical reaction equation and fillanly
addup those steps to write an overall reaction equation. A student activity on similar examples
for frequent practice was proposed for few identified students as part of differentiation.
Success of a student with special need depends on engaging with individual students to
understand their optimal learning methods (Walker & Gobby, 2017). The data demands on
careful planning and a moderated teaching style for couple of individual students as outlined
in research that students should collaborate as partners, allowing for alternative methods and
empowering them in their learning process(McMillan, 2014). By employing tailored
strategies and analyzing subsequent assessment data, educators can continually enhance their
teaching methods (McMillan, 2014).
6. Conclusion. The formative assessment is tools for a teacher to identify the real scenario of student
learning progression while teaching a particular topic of the curriculum. Formative
assessment is very diverse in types, style and ways of delivery which and the selection of a
particular formula of formative assessment depends on the goal. However, MCQ and short
response question is a quick way of assessing students level and progress which provides a
teacher an opportunity to further redefine the teaching strategies and assessment types in an
effective manner. This type of formative is well criticised for limited opportunities to assess
the cognitive skill of learner (Velan et al., 2008). However, adding MCQ with more
autonomous options identifying the confidence level of the students choice together with the
pre and post moderation process could help to meet expectation and assessment standard. In
addition, continuous feedback and iterative assessment aligned with curriuculum and learning
goal could improve student learning experience (Hattie, 2012). Ongoing assessment requires
more time for reviewing, providing feedback, and fostering peer collaboration to uphold
assessment principles.
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
- Access to all documents
- Unlimited textbook solutions
- 24/7 expert homework help
References:
AITSL. (2017). The Australian Institute for Teaching and School Leadership (AITSL). In.
Brady, L., & Kennedy, K. (2012). Assessment and Reporting: Celebrating Student Achievement
. Pearson Australia. https://books.google.com.au/books?
id=dKhZygAACAAJ
Brookhart, S. M. (2013). How to create and use rubrics for formative assessment and grading
. Ascd. Hassan, O. A. B. (2011). Learning theories and assessment methodologies – an engineering educational perspective. European Journal of Engineering Education
,
36
(4), 327-339.
https://doi.org/10.1080/03043797.2011.591486
Hattie, J. (2008). Visible learning: A synthesis of over 800 meta-analyses relating to achievement
. routledge. Hattie, J. (2012). Visible learning for teachers: Maximizing impact on learning
. Routledge. James, M. (2006). Assessment, teaching and theories of learning. Assessment and learning
,
47
, 60. Jennings, A. S. (2019). Situating interim assessments within teachers’ practice of data use: How upper elementary school teachers attend to, interpret, and understand interim assessment data
. University of Delaware. Klenowski, V., & Wyatt-Smith, C. (2013). Assessment for education: Standards, judgement and moderation
. Sage. McMillan, J. H. (2014). Classroom assessment: Principles and practice for effective standards-based instruction
. Pearson. McVee, M. B., Ortlieb, E., Reichenberg, J. S., & Pearson, P. D. (2019). The gradual release of responsibility in literacy research and practice
. Emerald Publishing Limited. Velan, G. M., Jones, P., McNeil, H. P., & Kumar, R. K. (2008). Integrated online formative assessments in the biomedical sciences for medical students: benefits for learning. BMC Medical Education
,
8
, 1-11. Walker, R., & Gobby, B. (2017). Testing times for assessment and pedagogy. In Powers of Curriculum: Sociological perspectives on education
(pp. 323-349). Weurlander, M., Söderberg, M., Scheja, M., Hult, H., & Wernerson, A. (2012). Exploring formative assessment as a tool for learning: students’ experiences of different methods
of formative assessment. Assessment & Evaluation in Higher Education
,
37
(6), 747-
760.
Related Documents
Related Questions
Many common materials that we ingest, though quite safe in reasonable quantities, become toxic when taken in very large doses. A measure of toxicity is the LD50 value (Lethal Dose, 50%). It is the quantity of material, expressed in mg of material per kg of subject-body-weight that, if administered to a population of subjects, would cause 50% of the population to die. The LD50 value for FD&C Red Dye No. 40 is >10,000 mg/kg in rats. Assume that the LD50 value for humans is the same as for rats.
Calculate the number of mg of Allura Red present in an 9 fluid ounce glass of the beverage you used in this lab and use this calculation to determine the number of such glasses of Allura Red sports drink required to reach the LD50 of 10,000 mg of Allura Red/kg body weight. Assume that the concentration of Allura Red in the beverage is 0.000038 M and the person has a body weight of 175 lbs.
The molar mass of Allura Red is 496.42 grams/mol
1 fl oz = 29.5735 mL
2.205 lbs = 1 kg
You may assume…
arrow_forward
Many common materials that we ingest, though quite safe in reasonable quantities, become toxic when taken in very large doses. A measure of toxicity is the LD50 value (Lethal Dose, 50%). It is the quantity of material, expressed in mg of material per kg of subject-body-weight that, if administered to a population of subjects, would cause 50% of the population to die. The LD50 value for FD&C Red Dye No. 40 is >10,000 mg/kg in rats. Assume that the LD50 value for humans is the same as for rats.
Calculate the number of mg of Allura Red present in an 9 fluid ounce glass of the beverage you used in this lab and use this calculation to determine the number of such glasses of Allura Red sports drink required to reach the LD50 of 10,000 mg of Allura Red/kg body weight. Assume that the concentration of Allura Red in the beverage is 0.000038 M and the person has a body weight of 175 lbs.
The molar mass of Allura Red is 496.42 grams/mol
1 fl oz = 29.5735 mL
2.205 lbs = 1 kg
You may assume…
arrow_forward
uiz: Final Exam Fall 2022
> с
ǝl
2022 Fall A
Home
asu.instructure.com/courses/129933/quizzes/1010775/take
Time in AZ
Announcements
Modules
Pearson Access
Grades
X +
Discussions
BryteWave Course
Materials
Resources
Smarthinking Online
Tutoring
Accessibility
Honorlock ASUO
ASU Course Policies
Expand
IG.
Question 3
A piece of Na placed into a graduated cylinder of water displaces 22 mL of water. Based on the
given densities, what was the mass of the metal put into the container?
Density (g/cm³)
Metal
titanium 4.50
potassium 0.862
manganese 7.44
lead
sodium
O 21 g
O 13 g
O 17 g
O 9.7 g
O 6.3 g
11.3
4 pts
0.968
arrow_forward
The sun supplies energy at a rate of about 1.0 kilowatt per square meter of surface area (1 watt = 1 J/s). The plants in
an agricultural field produce the equivalent of 21 kg of sucrose (C12 H22 O11) per hour per hectare (1 ha = 10,000 m
Assuming that sucrose is produced by the reaction
m²).
12CO2 (9) + 11H2O(1)
→ C12H22O11(s) + 120O2(g) AH=5640 kJ
calculate the percentage of sunlight used to produce the sucrose – that is, determine the efficiency of photosynthesis in
this field.
Percent efficiency
arrow_forward
26) The floor tiles in SE 27 are about 1 square foot and the lab is about 25 tiles wide and about
36 tiles from front to back. When the emergency shower was demonstrated, in 10. seconds
the water in the trash can was about 1 foot deep. One student estimated this was 2.5 gallons.
Estimate how deep the room will get in inches after a 15 minute shower. List 3 simplifving
assumptions you make in this calculation
rea
L-36 Tile
fiDw
ill it cost2 The density of gold is
27l An artist plans to apply gold leaf to a painting with an area of 2.32 f? and a thickness of 1.50
arrow_forward
For Q6. I am uncertain on how 20.49 is the answer because I thought we’d use the figure with least sig figs which is 1 sig fig in this problem. I’m confused on why it’s 4 sig figs in the answer.
arrow_forward
Many common materials that we ingest, though quite safe in reasonable quantities,
become toxic when taken in very large doses. A measure of toxicity is the LD 50
value (Lethal Dose, 50%). It is the quantity of material, expressed in mg of material
per kg of subject-body-weight that, if administered to a population of subjects,
would cause 50% of the population to die. The LD 50 value for FD&C Red Dye No.
40 is >10,000 mg/kg in rats. Assume that the LD 50 value for humans is the same as
for rats.
Calculate the number of number of glasses of Allura Red sports drink, each
containing 8.8 mg of Allura Red, required to reach the LD 50 of 10,000 mg of Allura
Red/kg body weight. Assume the person has a body weight of 165 lbs.
2.205 lbs 1 kg
!!
You may assume two significant figures but do not use sčientific notation.
Do not include units with your answer.
Your Answer:
Answer
arrow_forward
Many common materials that we ingest, though quite safe in reasonable quantities, become toxic when taken in very large doses. A measure of toxicity is the LD 50 value (Lethal Dose, 50%). It is the quantity of material, expressed in mg of material per kg of subject-body-weight that, if administered to a population of subjects, would cause 50% of the population to die. The LD 50 value for FD&C Red Dye No. 40 is >10,000 mg/kg in rats. Assume that the LD 50 value for humans is the same as for rats.
Calculate the number of number of glasses of Allura Red sports drink, each containing 11.1 mg of Allura Red, required to reach the LD 50 of 10,000 mg of Allura Red/kg body weight. Assume the person has a body weight of 200 lbs.
2.205 lbs = 1 kg
You may assume two significant figures but do not use scientific notation.
Do not include units with your answer.
arrow_forward
Many common materials that we ingest, though quite safe in reasonable quantities,
become toxic when taken in very large doses. A measure of toxicity is the LD 50 value
(Lethal Dose, 50%). It is the quantity of material, expressed in mg of material per kg of
subject-body-weight that, if administered to a population of subjects, would cause
50% of the population to die. The LD 50 value for FD&C Red Dye No. 40 is >10,000
mg/kg in rats. Assume that the LD 50 value for humans is the same as for rats.
Calculate the number of number of glasses of Allura Red sports drink, each containing
9.3 mg of Allura Red, required to reach the LD 50 of 10,000 mg of Allura Red/kg body
weight. Assume the person has a body weight of 225 Ibs.
2.205 Ibs = 1 kg
%3!
arrow_forward
Rsimi, Nour
2023VVA Chemistry.7b.FA1
An unknown solid substance is heated according to the temperature versus time graph below.
Temperature (°C)
70
40
30
20
288 8 2
0
0
5
15
Time (min)
20
00
4 of 5
1
2
3
4
5
25
While the substance is a liquid, at what temperature do the molecules of the substance have the greatest average kinetic energy?
2
%
3
4
5
16
7
8
insert
arrow_forward
Please answer fast it’s very important and urgent I say very urgent so please answer super super fast please
For the image attached
For 1. a
Mass of metal:
Trial 1 is 35.0228 g
Trial 2 is 35.0915 g
Trial 3 is 34.0821 g
Mass of water:
Trial 1 is 20.0177 g
Trial 2 is 20.0250 g
Trial 3 is 20.0168 g
For delta t of water:
Trial 1 is 15.5 C
Trial 2 is 15.7 C
Trial 3 is 15.1 C
For delta t of metal
Trial 1 is 80.1 C
Trial 2 is 80.2 C
Trial 3 is 79.5 C
For B my calculated Specific heat is:
Trial 1 is 0.462
Trial 2 is 0.467
Trial 3 is 0.466
arrow_forward
Please help me answer the following questions using the data I included. 1&2
arrow_forward
You are interested to know the Q10 value for mean heart rate (# of beats/10 sec) for a species of crab for the
temperature interval of 25°C - 35°C. To find this value, you collect data for these six temperatures and calculate mean
heart rate (# of beats/10 sec) for each temperature. Here is the data:
10°C
15°C
20°C
25°C
30°C
35°C
Mean Heart Rate (#
23.67
23.89
24.33
27
35.89
37.78
beats/10 sec)
What is the Q1o value for heart rate (# of beats/10 seconds) for the temperature interval of 25°C - 35°C? Round your
answer to two decimal places.
arrow_forward
You and your friends are having lunch together and complaining about the cold weather. Kathy begins telling about her spring break trip to warm,
sunny Spain. She starts to laugh when she tells the group that she was frustrated when she awoke on the first day to an outside temperature of 18°
and a predicted high of 24°. Kathy was laughing because in Spain temperatures are measured in Celsius. What was the predicted high in
Fahrenheit?
> View Available Hint(s)
O75.2 °F
6.2 °F
100.8 °F
O75 °F
arrow_forward
因
+ II
P
8
团
w/
S - Cameron Hite Learn
b Chemistry Questions & Answers
+
A www-awu.aleks.com/alekscgi/x/Isl.exe/1o_u-IgNslkr7j8P3jH-IVDWKVW_BBZZI6tTytly4Fcfu6zOtOf8oMM9sLjOBhHfJ6ZNhysAi_9KCqM8FRGCtiPxvdUuxrTTETxcEo9QVTr9NhEkLqSLo?1oBw7QYjlbav. E
O CHEMICAL REACTIONS
0/3
Cameron V
Solving for a reactant in solution
One way the U.S. Environmental Protection Agency (EPA) tests for chloride contaminants in water is by titrating a sample of silver nitrate solution. Any chloride
anions in solution will combine with the silver cations to produce bright white silver chloride precipitate.
Suppose an EPA chemist tests a 200. mL sample of groundwater known to be contaminated with tin(II) chloride, which would react with silver nitrate solution
like this:
SnCl,(aq) + 2 AgNO,(aq) → 2 AgCl(s) +
Sn(NO,),(aq)
The chemist adds 23.0 mM silver nitrate solution to the sample until silver chloride stops forming. He then washes, dries, and weighs the precipitate. He finds he
has collected
6.8
of silver…
arrow_forward
Green Chemistry and Atom Economy
The purposeful design of chemical products and processes that minimize the use of environmentally hazardous substances and the generation of waste is known as green chemistry. Green chemistry is a philosophical approach that is being applied to many areas of science and technology, and its practice is summarized by guidelines known as the “Twelve Principles of Green Chemistry” (see details at this website (http://openstaxcollege.org/l/16greenchem) ). One of the 12 principles is aimed specifically at maximizing the efficiency of processes for synthesizing chemical products. The atom economy of a process is a measureof this efficiency, defined as the percentage by mass of the final product of a synthesis relative to the masses of all the reactants used: atom economy = mass of product/mass of reactants × 100%Though the definition of atom economy at first glance appears very similar to that for percent yield, be aware that this property represents a…
arrow_forward
student found a bottle of unknown origin in the basement of an
"CAUTION—contains С₁H₁O.” No other
A
old house. The bottle was labelled
information was given, but inside the bottle were some white crystals.
The student took the bottle to a chemistry laboratory, where she analyzed the
crystals with the help of the laboratory staff. C₁2H₁6O reacted with Br₂ in CCl4
adding one mole of Br, and forming C₁₂H₁OB2₂.
When a sample of C₁₂H₂O was reacted with O3 followed by Zn/H₂O, two
different samples, J and K, were obtained. Compound J had a molecular formula
of C.HgO₂, and its NMR is shown below.
Compound K had a molecular formula of C₂H₂O, and it could be oxidized to
compound L, with a molecular formula of C₂H₂O₂. The IR spectrum of L showed
a very wide, strong band centred around 3000 cm*¹. The NMR spectrum of L
showed only two different absorptions: a doublet (6H) at 0.9 ppm and a septet
(1H) at 3.6 ppm. There was also a singlet (1H) off the scale at 11.8 ppm.
students, deduce possible…
arrow_forward
Chemistry
A stoppered flask in your laboratory drawer is stamped by the manufacturer with the notation “TC 25 250 mL”. Explain what this notation means.
arrow_forward
Part C
F10
BO
O 3.04 × 10³
6.27 x 10-1
The dosage of quinine when a 145-lb adult takes a 200.-mg tablet is equivalent to
ug drug per kg of body weight.
► View Available Hint(s)
O 627
O 1.38 × 10³
P Pearson
*
Education Inc. All rights reserved. | Terms of Use Privacy Policy. Permissions Contact Us |
Bb
Home
L
End
Insert
■ Review |- Constants | Periodic Table
1
2
arrow_forward
Project PART I. Our Carbon Budget
A major driver of global climate change is the emissions of greenhouse gases such as CO₂ into the
atmosphere from human activities such as the burning of fossil fuels for transportation, electric
power generation, manufacturing, agriculture, home heating, and so forth. Global average temper-
atures are now slightly higher than 1° C above their pre-Industrial Revolution levels. Damaging
sea level rise and extreme weather events (such as the recent wildfires in Canada that led to the
unhealthy air in NYC last summer) will become an increasingly major problem around the world
if global average temperature rises more than 1.5° C. Scientists estimate that the total additional
amount of CO₂ that can be put into the atmosphere without reaching the 1.5° C level is about 51
parts per million (ppm) or approximately 400 Gigatons (Gt). Let's call 51 ppm our carbon budget.
In this project, we want to use linear systems of differential equations to analyze the…
arrow_forward
2
3
4
-5 g
. Use this information to calculate K.n for PbCO2.
The solubility of PbCO, in water at 25 °C is measured to be 7.3 × 10
sp
Round your answer to 2 significant digits.
Continue
O 2022 McGraw Hill LLC. All Rights Reserved. Ter
II
20
arrow_forward
SEE MORE QUESTIONS
Recommended textbooks for you

Introductory Chemistry: An Active Learning Approa...
Chemistry
ISBN:9781305079250
Author:Mark S. Cracolice, Ed Peters
Publisher:Cengage Learning

Introductory Chemistry: A Foundation
Chemistry
ISBN:9781285199030
Author:Steven S. Zumdahl, Donald J. DeCoste
Publisher:Cengage Learning
Related Questions
- Many common materials that we ingest, though quite safe in reasonable quantities, become toxic when taken in very large doses. A measure of toxicity is the LD50 value (Lethal Dose, 50%). It is the quantity of material, expressed in mg of material per kg of subject-body-weight that, if administered to a population of subjects, would cause 50% of the population to die. The LD50 value for FD&C Red Dye No. 40 is >10,000 mg/kg in rats. Assume that the LD50 value for humans is the same as for rats. Calculate the number of mg of Allura Red present in an 9 fluid ounce glass of the beverage you used in this lab and use this calculation to determine the number of such glasses of Allura Red sports drink required to reach the LD50 of 10,000 mg of Allura Red/kg body weight. Assume that the concentration of Allura Red in the beverage is 0.000038 M and the person has a body weight of 175 lbs. The molar mass of Allura Red is 496.42 grams/mol 1 fl oz = 29.5735 mL 2.205 lbs = 1 kg You may assume…arrow_forwardMany common materials that we ingest, though quite safe in reasonable quantities, become toxic when taken in very large doses. A measure of toxicity is the LD50 value (Lethal Dose, 50%). It is the quantity of material, expressed in mg of material per kg of subject-body-weight that, if administered to a population of subjects, would cause 50% of the population to die. The LD50 value for FD&C Red Dye No. 40 is >10,000 mg/kg in rats. Assume that the LD50 value for humans is the same as for rats. Calculate the number of mg of Allura Red present in an 9 fluid ounce glass of the beverage you used in this lab and use this calculation to determine the number of such glasses of Allura Red sports drink required to reach the LD50 of 10,000 mg of Allura Red/kg body weight. Assume that the concentration of Allura Red in the beverage is 0.000038 M and the person has a body weight of 175 lbs. The molar mass of Allura Red is 496.42 grams/mol 1 fl oz = 29.5735 mL 2.205 lbs = 1 kg You may assume…arrow_forwarduiz: Final Exam Fall 2022 > с ǝl 2022 Fall A Home asu.instructure.com/courses/129933/quizzes/1010775/take Time in AZ Announcements Modules Pearson Access Grades X + Discussions BryteWave Course Materials Resources Smarthinking Online Tutoring Accessibility Honorlock ASUO ASU Course Policies Expand IG. Question 3 A piece of Na placed into a graduated cylinder of water displaces 22 mL of water. Based on the given densities, what was the mass of the metal put into the container? Density (g/cm³) Metal titanium 4.50 potassium 0.862 manganese 7.44 lead sodium O 21 g O 13 g O 17 g O 9.7 g O 6.3 g 11.3 4 pts 0.968arrow_forward
- The sun supplies energy at a rate of about 1.0 kilowatt per square meter of surface area (1 watt = 1 J/s). The plants in an agricultural field produce the equivalent of 21 kg of sucrose (C12 H22 O11) per hour per hectare (1 ha = 10,000 m Assuming that sucrose is produced by the reaction m²). 12CO2 (9) + 11H2O(1) → C12H22O11(s) + 120O2(g) AH=5640 kJ calculate the percentage of sunlight used to produce the sucrose – that is, determine the efficiency of photosynthesis in this field. Percent efficiencyarrow_forward26) The floor tiles in SE 27 are about 1 square foot and the lab is about 25 tiles wide and about 36 tiles from front to back. When the emergency shower was demonstrated, in 10. seconds the water in the trash can was about 1 foot deep. One student estimated this was 2.5 gallons. Estimate how deep the room will get in inches after a 15 minute shower. List 3 simplifving assumptions you make in this calculation rea L-36 Tile fiDw ill it cost2 The density of gold is 27l An artist plans to apply gold leaf to a painting with an area of 2.32 f? and a thickness of 1.50arrow_forwardFor Q6. I am uncertain on how 20.49 is the answer because I thought we’d use the figure with least sig figs which is 1 sig fig in this problem. I’m confused on why it’s 4 sig figs in the answer.arrow_forward
- Many common materials that we ingest, though quite safe in reasonable quantities, become toxic when taken in very large doses. A measure of toxicity is the LD 50 value (Lethal Dose, 50%). It is the quantity of material, expressed in mg of material per kg of subject-body-weight that, if administered to a population of subjects, would cause 50% of the population to die. The LD 50 value for FD&C Red Dye No. 40 is >10,000 mg/kg in rats. Assume that the LD 50 value for humans is the same as for rats. Calculate the number of number of glasses of Allura Red sports drink, each containing 8.8 mg of Allura Red, required to reach the LD 50 of 10,000 mg of Allura Red/kg body weight. Assume the person has a body weight of 165 lbs. 2.205 lbs 1 kg !! You may assume two significant figures but do not use sčientific notation. Do not include units with your answer. Your Answer: Answerarrow_forwardMany common materials that we ingest, though quite safe in reasonable quantities, become toxic when taken in very large doses. A measure of toxicity is the LD 50 value (Lethal Dose, 50%). It is the quantity of material, expressed in mg of material per kg of subject-body-weight that, if administered to a population of subjects, would cause 50% of the population to die. The LD 50 value for FD&C Red Dye No. 40 is >10,000 mg/kg in rats. Assume that the LD 50 value for humans is the same as for rats. Calculate the number of number of glasses of Allura Red sports drink, each containing 11.1 mg of Allura Red, required to reach the LD 50 of 10,000 mg of Allura Red/kg body weight. Assume the person has a body weight of 200 lbs. 2.205 lbs = 1 kg You may assume two significant figures but do not use scientific notation. Do not include units with your answer.arrow_forwardMany common materials that we ingest, though quite safe in reasonable quantities, become toxic when taken in very large doses. A measure of toxicity is the LD 50 value (Lethal Dose, 50%). It is the quantity of material, expressed in mg of material per kg of subject-body-weight that, if administered to a population of subjects, would cause 50% of the population to die. The LD 50 value for FD&C Red Dye No. 40 is >10,000 mg/kg in rats. Assume that the LD 50 value for humans is the same as for rats. Calculate the number of number of glasses of Allura Red sports drink, each containing 9.3 mg of Allura Red, required to reach the LD 50 of 10,000 mg of Allura Red/kg body weight. Assume the person has a body weight of 225 Ibs. 2.205 Ibs = 1 kg %3!arrow_forward
- Rsimi, Nour 2023VVA Chemistry.7b.FA1 An unknown solid substance is heated according to the temperature versus time graph below. Temperature (°C) 70 40 30 20 288 8 2 0 0 5 15 Time (min) 20 00 4 of 5 1 2 3 4 5 25 While the substance is a liquid, at what temperature do the molecules of the substance have the greatest average kinetic energy? 2 % 3 4 5 16 7 8 insertarrow_forwardPlease answer fast it’s very important and urgent I say very urgent so please answer super super fast please For the image attached For 1. a Mass of metal: Trial 1 is 35.0228 g Trial 2 is 35.0915 g Trial 3 is 34.0821 g Mass of water: Trial 1 is 20.0177 g Trial 2 is 20.0250 g Trial 3 is 20.0168 g For delta t of water: Trial 1 is 15.5 C Trial 2 is 15.7 C Trial 3 is 15.1 C For delta t of metal Trial 1 is 80.1 C Trial 2 is 80.2 C Trial 3 is 79.5 C For B my calculated Specific heat is: Trial 1 is 0.462 Trial 2 is 0.467 Trial 3 is 0.466arrow_forwardPlease help me answer the following questions using the data I included. 1&2arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Introductory Chemistry: An Active Learning Approa...ChemistryISBN:9781305079250Author:Mark S. Cracolice, Ed PetersPublisher:Cengage LearningIntroductory Chemistry: A FoundationChemistryISBN:9781285199030Author:Steven S. Zumdahl, Donald J. DeCostePublisher:Cengage Learning

Introductory Chemistry: An Active Learning Approa...
Chemistry
ISBN:9781305079250
Author:Mark S. Cracolice, Ed Peters
Publisher:Cengage Learning

Introductory Chemistry: A Foundation
Chemistry
ISBN:9781285199030
Author:Steven S. Zumdahl, Donald J. DeCoste
Publisher:Cengage Learning