Writing Assignment 1_2(1)(1)

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Current Attempt in Progress From the curves shown in Animated Figure and using the following Equation, determine the rate of recrystallization for pure copper at the several temperatures. Make a plot of In(rate) versus the reciprocal of temperature (in K-1). (a) Determine the activation energy for this recrystallization process. (See Section FACTORS THAT INFLUENCE DIFFUSION.) (b) By extrapolation, estimate the length of time required for 50% recrystallization at room temperature, 20°C (293 K). (a) i kJ/mol (b) i days

Mixtures and Pure Substances Lab Data Sheet Discussion Questions: In the space provided for each question, type your response. Be sure to write complete sentences for your responses as well as use proper grammar and punctuation. Submit your lab data sheet as docx or pdf file in Canvas. 1.Classify the salt and pepper mixture. Click or tap here to enter text. 2.Why did you add water to the salt and pepper mixture? Click or tap here to enter text. 3.Classify the types of mixtures formed from the salt, pepper and water. Click or tap here to enter text. 4.What is the physical method used to separate the salt water from the pepper? Click or tap here to enter text. 5.What is the physical method used to separate the salt from water? Click or tap here to enter text. 6.What physical property is different in salt and water? Click or tap here to enter text. 7.What are the types of pure substances present in the salt solution? Click or tap here to enter text.

I need help understanding how to do this, can you please show me how you get the CFU/mL

Simplify. Write each answer in scie 17) (5.4x 10")는 (7X/0") 19) (6 x 10°(4 x 10-1) 21) (7.68 x 10:)는 (9x/0°)

PLEASE ANSWER ALL OF THE QUESTIONS ON THE PICTURE, PLEASE.

Please answer questions 3 and 4 and show work please. Thank you

Instructions You are required to produce a short lab report using the information given in the accompanying document, ‘Lab report assessment_student data’. This document introduces an experiment, and also provides a set of experimental data for this experiment. You are required to use this data to perform steps 8 and 9 of the procedure. This includes calculations of a particular value, and then comparison to the true value. Consider any experimental errors when comparing calculated values and true values. Your report should be between 300 and 500 words (including all table contents and titles of tables and graphs). Your lab report should consist of three sections only: • Experimental • Results and Discussion • Conclusion You do NOT need to include an introduction section. Your experimental section should be written in appropriate lab report format, (passive voice, 3 rd person, in paragraphs). Your results and discussion section should contain the data presented in table format, and…

Please short answer

Need help filling this out. It is the Data Sheet for Ch. 2 Qualitative Analysis. Very much appreciated!

Determine the apparatus/equipment that should be used in performing the given procedures in a chemical analysis. Check TWO ITEMS that apply.

earson.com/?courseld=1 ← 2 S MISSED THIS? Read Section 4.2 (Page); Watch KCV 4.2, IWE 4.2. W Write a balanced chemical equation for each reaction. म X → #3 E D C C $ 4 R F V % 5 T G B ^ ▾ 6 Part A G Search or type URL Y Aqueous hydrogen chloride reacts with oxygen gas to form chlorine gas and liquid water. Express your answer as a chemical equation. Identify all of the phases in your answer. ² ΑΣΦ H Submit Part B A chemical reaction does not occur for this question. Part C Request Answer Solid iron(III) oxide reacts with hydrogen gas to form solid iron and liquid water. Express your answer as a chemical equation. Identify all of the phases in your answer. Submit Request Answer MacBook Pro ΑΣΦ 4 A chemical reaction does not occur for this question. & 7 N Nitrogen monoxide gas reacts with hydrogen gas to form ammonia gas and water vapor. Express your answer as a chemical equation. Identify all of the phases in your answer. U J ☆ * 00 B 8 M C w ? I ? K ( 9. < O ) - O L P A I' Review I…

FINAL Experiment 1- January 2021_-789644623 - Saved Layout Review View Table A friend of yours went panning for gold last weekend and found a nugget that appears to be gold. With your newfound scientific prowess, you set out to determine if it is really gold. Your tests show that the nugget has a mass of 7.6 g. Immersing the nugget in water raised the volume from 7.22 mL to 8.06 mL. The density of gold is 19.32 g/cm3. What will you tell your friend? acer

Carla is using a fertilizer that contains nitric acid. How is nitric acid classified? strong acid weak acid strong base weak base Save and Exit Next Mark this and return ContentViewers/AssessmentViewer/Activit.

STANDARD SAMPLE PREPARATIONS FOR ABSORBANCE & CONCENTRATION DATA Concentration of stock nickel sulfate hexahydrate solution = .400 Molarity Sample Volume Absorbance Concentration (In Molarity) a 5 mL .179 10 mL .329 15 mL .588 20 mL .760 25 mL .939 Reference Blank = 0 Please show how to find Molarity, please show steps. Thank you and stay safe.

I need help calculating and setting up questions 4 or 5.   thank you for your help!

This question must be finished in your tutorial and this Word document containing your answers submitted within 120 minutes of the end of your tutorial. You will receive feedback from your tutor in a few weeks. The answers will be available where you obtained this. There are no marks for this exercise but it counts towards participation. Draw your answers on a separate piece of paper, take an image and insert the image(s) into this Word document at the end. (a) Re-draw the following molecule with the CH2CH2CH3 group on the ladder 1. H H2 ОН H3C H2 CH2 H;C (b) Is the molecule in part (a) the same molecule or the enantiomer of the following. Circle your answer Explain your answer CH3 SAME MOLECULE H2C H2 -CH3 ENANTIOMER H2 ОН 3. What is the configuration (R or S) of the chiral carbon in this molecule. Label the ranking of each of the groups on the chiral carbon from 1 (highest) to 4 (lowest) Draw the representation of this molecule with the lowest ranked group (4) on the ladder and…

Sea X Assignments: ANATO X Gi 0220907135028396%20(1).pdf 2 CD Page view Human Anatomy X A Read aloud *20220907135028396 X TAdd text Draw 4 You prepare four solutions: Solution 1: Reactants + enzyme at #0 (about 100°F) and pH 7 Chemistry Check your recall lab. x V Highlight UNIT 2 65 3 Decompression sickness (also known as the bends) is a condition that affects divers and others operating under pressurized conditions. It occurs when gases such as nitrogen (N₂) come out of solution in the blood. This can lead to symptoms including joint pain, shortness of breath, and paralysis. Severe cases may result in death. a What type of molecule (ionic, polar covalent, nonpolar covalent) is nitrogen gas? b The liquid medium of blood is water. What type of compound (ionic, polar covalent, nonpolar covalent) is water? c What happens when molecules such as nitrogen gas mix with water? How does this explain the problems we see with decompression sickness?

Methods of Analysis Test #1: Polarity, or Effect of a charged rod on a stream of liquid: This test was used to determine the relative polarity of the unknown liquid. The liquid was allowed to run out of a buret and a charged rod was brought up next to the stream. The observations were reported as to whether or not the stream of liquid responded to the charged rod and to what degree. Try this at home with water and a plastic spoon. Rub the plastic spoon against a sweater and move it close to a small stream of water running out of your faucet! Test #2: Volatility, or Rate of Evaporation: A thermometer probe was wrapped with a strip of filter paper. This assembly was soaked in one of the liquids for one minute. The probe was removed, and the temperature change was monitored as the liquid evaporated. The results are given in Graph 1 below. (See Graph)   Graph 1: The curves generated of the change in temperature over time for the substances acetone, hydrogen monoxide, ethylene glycol,…

Use the information below to answer questions 1- 3. PCI,(g) 2 PCI;(g) + Cl2(8) PCI,(g) decomposes into PCI,(g) and Cl,(8) according to the equation above. A pure sample of PCI,(g) is placed in a rigid, evacuated 1.00 L container. The initial pressure of the PCI5(g) is 1.00 atm. The temperature is held constant until the PCI,(g) reaches equilibrium with its decomposition products. The figures below show the initial and equilibrium conditions of the system. PCI5 Potal = 1.00 atm PCI5, PCI3, and CI, Prstal = 1.40 atm Figure 1: Initial Figure 2: Equilibrium As the reaction progresses toward equilibrium, the rate of the forward reaction (A) increases until it becomes the same as the reverse reaction rate at equilibrium (B) stays constant before and after equilibrium is reached (C) decreases to become a constant nonzero rate at equilibrium (D) decreases to become zero at equilibrium If the decomposition reaction were to go to completion, the total pressure in the container would be (A) 1.4…

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Based off information from the attachment, please help with #13 on second attachment

For the data below, if a diluted (DF=100) water sample has an absorbance of 0.057, calculate the number of Cu atoms in a 100 mL sample. Answer using 3 significant figures. For Scientific Notation use this pattern example 6.02x10^23 Cu mg/L Absorbance 0 0.002 2 0.045 4 0.093 6 0.133 8 0.177 0.197 10

Can you please please rewrite the question in your own words to clarify it, also write a useful hint to help you understand this problem and Provide the correct answer? Show the calculation and briefly describe the steps At the very end, write a paragraph addressing any knowledge/skill gaps, deficiencies in how you approach studying, and specifics on how you will improve Please answer fast and please try to answer all

board Instructions Please select the best answer for each of the questions. This test has a time limit of 2 hours.This test will save and submit automatically when the time expires. Warnings appear when half the time, 5 minutes, 1 minute, and 30 seconds remain. Timed Test Multiple Attempts Not allowed. This test can only be taken once. Force Completion Once started, this test must be completed in one sitting. Do not leave the test before clicking Save and Submit This test does not allow backtracking. Changes to the answer after submission are prohibited. Your answers are saved automatically. Remaining Time: 1 hour, 34 minutes, 00 seconds. * Question Completion Status: A Moving to the next question prevents changes to this answer. Question 2 What is the pH of the solution which results from mixing 25 mL of 0.20 M CH3CO>H and 25 mL of 0.20 M NAOH? (K, for CH3CO>H = 1.8 x 10-b) OA 8.87 OB. 10.43 OC7.00 OD.9 02 OE 5.13 A Moving to the next question prevents changes to this answer. *- F11…

points: you will reciev a cal ator and clean scrap paper. Timed Test This test has a time limit of 2 hours.This test will save and submit automatically when the time expires. Warnings appear when half the time, 5 minutes, 1 minute, and 30 seconds remain. Multiple Attempts Not allowed. This test can only be taken once. Force Once started, this test must be completed in one sitting, Do not leave the test before clicking Save and Submit. Completion Your answers are saved automatically. Remaining Time: 1 hour, 58 minutes, 27 seconds. v Question Completion Status: Moving to another question will save this response. Question 5 A solution containing 2.5 grams of unknown and 25 grams of benzene (kf-5.12 °c/m, Tºf = 5.5°C) freezes at 4.30c. What is the molar mass of the unknown? A Moving to another question will save this response.

Write as many accurate and relevant statements about the following visual prompt as you can think of. No less than 8 statements. Drawings with descriptions of their meanings can be considered a response too.

For the data below, Write the linear equation of the line (use 5 Decimal places and don't add "space") example y=1.23456x+4.32101 Cu mg/L Absorbance 0 0.002 0.045 0.093 0.133 0.177 0.197 24 4 6 8 10

Hello, I hope you are doing well on this fine day. For the following quetion please read carefully the question and instruction. PLEASE ANSWER QUESTION IN 20 MINTUES NOT MORE PLEASE AND THANK YOU. If you do answer the question correctly and post it in the next 20 minutes, NO NEED TO SHOW ALL THE WORK, I JUST WOULD LIKE THE CORRECT ANSWER AS SOON AS POSSIBLE. I will write a wonderful and generous feedback/review/rating about you. What is the total amount (in mol) of ions in solution when 34.7 g of the ionic solid Ba(OH)2·8H2O completely dissolves in water? The molar mass of Ba(OH)2·8H2O is 315.46 g/mol.

In general,the color that we see is __to the color absorbed.  What words should be put in the blank?

Write the balanced equation for the neutralization of acid rain (assume HNO3 is dissolved in water) by limestone (calcium carbonate). Express your answer as a chemical equation. ΑΣφ ? DA chemical reaction does not occur for this question. Submit Request Answer Provide Feedback 76 tv

Please use the correct significant digits (3), if needed use scientific notation.

For each of the following scenarios, determine if the error will cause the molarity of the hydrochloric acid to be greater than, less than, or the same as the initial value. A: A student adds 50 mL of water to the reaction flask with unknown hydrochloric acid instead of the 25 mL sated in the procedure. B: A student adds 50 mL of water to the reaction flask with unknown hydrochloric acid instead of the 25 mL stated in the procedure. C: A student doesn't notice the some of the HCL has dripped out from the volumetric pipet when transferring to the reaction flask