Speaking_Notes_Draft

Please do Question 2

2 What is reservior in environmental chemistry? What are O1D (O singlet D) and O3P( O priplet P)? Not sure if it's written in this way.

What type of activities will you prepare to explain for students to explain the different types of pollution and effects of pollution on our health

Please send me the question in 20 minutes it's very urgent plz question 21 Part 1 and 2

c. HAt + Th(OH), →`

1: Write all the chemical reactions involved in the formation of acid rain from sulfur dioxide (SO2) and rain (H2O).

1. The recent river pollution series in Malaysia took place in 2019 in Sungai Kim Kim (Johor) and Sungai Selangor (2020).Briefly discuss the causes and suggest potential mitigating measures.

Write your complete solutions on yellow paper, round your answers to the appropriate number of significant figures, and box the final answer. The deadline for submission is at the end of the class. Note: You do not need to write your solutions for the items that can be derived from your calculators. 1. Three students (Saerom, Hayoung, and Jiwon) are asked to determine the ppm Ca in a drinking water sample by titration with EDTA. Each student performed five trials for the sample. The results in ppm Ca are the following: Saerom Hayoung Jiwon a. Get the mean, SD, and % RSD of each student's results. b. If the true value is 35 ppm, calculate the relative error of each student's results. c. Comment on the precision and accuracy of each student's results. The maximum % RSD and the relative error set by the lab is 5.0%. d. Use the following table to summarize your answers. Mean SD %RSD Relative Error Comment 31, 32, 33, 33, 32 35, 34, 34, 35, 34 35, 38, 33, 35, 37 Saerom Mean SD 95% CI…

What is Environmental chemistry? What is Stoichiometry? What are the types of chemical reactions? Include sources and cite references.

What is the role of Chemistry in environmental protection?

The equation for photosynthesis is 6H2O (water) + 6CO2 (carbon dioxide) + Light Energy → C6H12O6 (glucose) + 6O2(oxygen). When first discovered, scientists were trying to decide if the oxygen in the product came from carbon dioxide or water. Which statement describes how scientists traced the path of oxygen?

FALBERTA It is estimated that the total amount of oxygen (O2) contained in BIFS is equivalent to 6.6% of the oxygen present in the modern atmosphere. This is quite impressive given that the atmosphere during Archaean and early Proterozoic times was largely devoid of oxygen! Therefore, this reflects the photosynthetic efficiency of the early biosphere, coupled with its operation over long periods of time. Knowing that the mass of the modern atmosphere is 5.01×1018 kg, of which 21% is oxygen, what is the mass (in kilograms) of oxygen contained within BIFS? 6.9 x 1016 kg of O2 contained in BIF deposits Knowing that the molecular mass of O2 is 32 g/mole (0.032 kg/mole), how many moles of O2 are contained within BIFS? 2.17 x 1018 moles of O2 contained in BIF deposits Now, let us think about iron (Fe). The total mass of BIF's globally is estimated at 5.0x1017 kg, wherein iron accounts for approximately 35% by mass. The atomic mass of iron is 55.8 g/mole (0.0558 kg/mole). What is the total…

2. Based on what you have learned so far, why is it necessary to stir the water and wait until the end of the video to read the dissolved oxygen? The stirring aerates the water, causing the oxygen to dissolve more easily in the water. The stirring causes oxygen molecules to leave. The stirring causes the H20 to break apart and release oxygen. The stirring causes hydrogen gas to mix with oxygen gas making water.

Please answer all the questions !!!

<p>Explain why the diatomic nitrogen atom is unusable by most plants. Where do plants get nitrogen?

Subject : Chemistry and Environmental Pollution Write short notes on the following contaminants of emerging concern (CECs). The notes should explain what are they, their properties, uses, where it is found and their health risks.   •Endocrine-disrupting compounds (EDCs)   •Nanomaterials   •Microplastics

Kindly answer this question

Menu = Activity 2: Does 5 + 5 always equal 10? Initial ideas Question #1 Qu In the boxes below, draw models to show what you think water, ethanol, and the mixture of the two would look like if you could zoom in and "see" their structure and composition. In Water Ethanol Mxture

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Paragraph 5: Discuss Fractional Distillation of petroleum oil to give the chemical feedstock to make synthetic polymers for commercial use of products in our daily lives and discuss your personal thoughts on incresing US drilling in the Gulf of Mexico or in the Artic. Think about it, every time you go to the grocery store and get a plastic bag which immediately gets discarded. Include your thoughts on mandatory recycling in the US especially for schools, government buildings, etc.

Your Answers: Assess It! 4. As we look around space we find that most of it is composed of (4). hydrogen combines with carbon which is the basis for all living things. Combining different (6). A group of two or more atoms that are bonded together is called a (7). are combined in a specific way, or ratio, the substance is called a (8). of hydrogen. When the forms a (5)_ 7. together form different substances. 8. _. And when the elements (e.g. water). DELL 5. 6.

these are 2 separate questions

How much of anthropogenic carbon is taken up by the oceans?

Answer question 5

When ozone levels in urban area reach unhealthy levels, residents are typically urged to avoid refuelingtheir cars during daylight hours. Explain how this might help to reduce smog formation?

Profiles Tab Window Help - Cengage Learning X + /takeAssignment/takeCovalent Activity.do?locator assignment-take [Review Topics] [References] Use the References to access important values if needed for this question. Use the solubility generalizations on the information page to predict if one or more precipitates will form when aqueous solutions of potassium hydroxide (KOH) and cobalt(II) chloride (CoCl₂) are mixed. Submit Answer Write the formula of any precipitate that could form in one of the boxes. If a box is not needed, leave it blank. If no precipitate is predicted, leave both boxes blank. NOV 30 Retry Entire Group L 9 more group attempts remaining A tv La. Previous Next S Save and Exit W

It measures the amount of water used to produce the goods and to provide services. Water quality index pH level Water footprint Carbon footprint

Is it acceptable to recycle the containers of hazardous chemicals? Why or why not? Explain your answer within the context of chemical safety.

Draw the Lewis structure for the chlorofluorocarbon CFC-11, CFCl3 What chemical characteristics of this substance allow it to effectively deplete stratospheric ozone

In Module #4, we discussed the role of chlorofluorocarbons (CFCs) in catalyzing the destruction of O3 in the stratosphere. One example of a CFC that is known to exasperate formation of the hole in the O3 layer is dichlorodifluoromethane (CF2Cl2). In the year 2000, this chemical reached its peak concentration of 2.2 x 10-11 M in the atmosphere. The destruction of CF2Cl2 can be approximated as a first-order process and the 1996 treaty on CFC emissions has eliminated its release into the atmosphere. Given that the rate constant for destruction of CF2Cl2 in the atmosphere is 0.009 yr-1, how long will it take for the concentration of CF2Cl2 to decline to 0.22 x 10-11 M?

3-4 sentences   1. Briefly state what separates science from opinion?   2. Water is the most important molecule to life on this planet. Briefly explain why water has the unique properties it does (high boiling point, high freezing point, high capacity of heat, etc.), especially for a small molecule.   3. How does the depth of water affect light availability? How deep does light penetrate ocean water? How might this affect ocean life?   4. The world oceans are dynamic. One reason is because the oceans are in constant motion. One means of water motion are waves. What are waves? What are three factors that affect wave height?