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Dangerous Paint Stripper Jessica has a summer job working for the city parks program. She has been using a cleaner called “Graffiti Gone” to remove graffiti from the bathrooms. She has to take a lot of breaks, because the chemical makes her throat burn. It also makes her feel dizzy sometimes, especially when the bathrooms don’t have very many windows. On the label, she sees that the cleaner has methylene chloride in it. She feels like she’s managing to get the work done, but she is worried about feeling dizzy. She wants to find out more about this chemical, what harm it can cause, and whether there are safer ways to do this work. Questions for following story. 1. What went right in this situation? 2. What went wrong in this situation? 3. What steps should be taken in this workplace to make sure employees are better protected and prepared the next time?

The life cycle of a plastic bottle After reading the text below, answer the following questions. Make sure to put it in your own words. This is the story of three plastic bottles, empty and discarded. Their journeys are about to diverge with outcomes that impact nothing less than the fate of the planet. But they weren't always this way. To understand where these bottles end up, we must first explore their origins. The heroes of our story were conceived in this oil refinery. The plastic in their bodies was formed by chemically bonding oil and gas molecules together to make monomers. In turn, these monomers were bonded into long polymer chains to make plastic in the form of millions of pellets. Those were melted at manufacturing plants and reformed in molds to create the resilient material that makes up the triplets' bodies. Machines filled the bottles with sweet bubbly liquid and they were then wrapped, shipped, bought, opened, consumed and unceremoniously discarded. And now here they…

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

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2.) It’s a bad day in the lab!  Two students are doing experiments.  Each is 20 feet away from the professor.  At the same time, each of them lets the same amount of a smelly gas into the room.  One of them releases ammonia, NH3, and the other releases SO2.  NH3 has a pungent odor, and SO2 smells like rotten eggs.  The professor has no idea that this has happened, until she smell the first gas.  Which chemical will the professor smell first?   (NH3 or SO2)                                .  If the professor starts to smell the first gas 42. seconds after the gas is released, how long will it take her to smell the second gas?       sec. * Note: It is unsafe practice to work with these chemicals in an open lab.

MCPBA CH2N2, hv Br2, CC14

PLEASE DO HELP ME.. NO NEED FOR EXPLANATION...THIS IS JUST A PRACTICE EXERCISE FOR OUR UPCOMING ORAL AND THESE ARE THE SAMPLE QUESTIONS..PLEASE ANSWER SHORTER.. I WILL GIVE HELPFUL RATING AFTER

= O PRINCIPLES OF ORGANIC CHEMISTRY Identifying rigid parts of an acyclic organic molecule In the actual molecule of which this is a Lewis structure, which of the labeled distances can change? marked O B H C L O O unmarked H C O C H H 00.. X ▬▬— You can click the "unmarked" tab to see the molecule without any of the distances marked. List all the distances that can change. For example, suppose all the distances were measured at a certain time, and again 0.1s later. If distance A might be 50% bigger or smaller the second time, but all the other distances are certain to be the same, you should write "A". If A and B might be different the second time, but no other distances, you would write "A, B". And so on. Note for advanced students: you can assume the molecule is dissolved in an appropriate solvent at room temperature. S ? 3/5 Darius V olo Är 4

What is a possible testable question (in correct format) That Mrs love might ask for this Sanrio?

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1. CzH5OH(I) + HCOOH(I) → HCOOCzHs + H2O(I) 2. C₂H5OH(1)→ C₂H4(g) + H₂O(1) 3. C₂H4(9) + Cl₂(g) → C₂H4C12(1) 4. C6H6(1) + Br2(1)→ C6H5Br(1) + HBr(g) 5. 2C4H10(9) + 130₂(g) → 8CO₂(g) + 10H₂O(1) 6. 2C7H8(1) + 150₂(g) → 14CO(g) + 8H₂O(1) Match each equation above with its reaction type. Reaction Type Addition Complete combustion Elimination Esterification Incomplete combustion Substitution Reaction Number from Above → ◆ ◆ Fill in the blanks to complete the following statement. One method used to differentiate between saturated and unsaturated compounds is to add a few drops of orange-coloured aqueous bromine to samples of each organic compound. If the compound is ◆ the orange colour will quickly fade.

D) E) ??? HO م سر مسح ??? OH 333 ??? ??? srom 101 to OH :0

What is Donnan's theory? What is its importance in biophysical chemistry?

I know you don't answer graded questions and I am not looking for you to straight up give me the answer to this but how do I even start? like I said before I know that the highest peak is 16amu which is Oxygen but do I just the vertical bar as a ratio? Like the next bar to the left (15amu?) is like 90% intensity? so like 9:10 ratio? There isn't even a 15amu element so please just give me some idea where to start. The place in the book it tells you to go to read has nothing about this stuff, its about finding empirical formulas from mass or percentages.... please help me!

Years in the future, you venture into a long-forgotten landfill site to find antique bottles. As you dig, you unearth a plastic toy you threw away when you were six years old. How is it that this toy is still largely intact?

H J K L Enter V B N M Shift Chapter 2 An Introduction to the Chemistry of Life 37 SELF-QUIZ: TESTING YOUR KNOWLEDGE 1. Each atom has a nucleus made up of р. 24. 2. In atoms, the number of protons is usually equal to the number of 3. The atomic number of an atom is equal to the number of 7. Proteins and carbohydrates consist primarily of carbon, hydrogen, and oxygen; these two molecules are types of and neutrons. -compounds. p. 31. 8. On the pH scale, a pH of is neutral; a solution with a pH less than this is this is 9. Chemicals like bicarbonate that resist pH change are called р. 25. and a solution with a pH greater than р. 32, in the nucleus. p. 26. 4 An alternative form of an atom is called an differs in the number of neutrons in the nucleus. p. 26. 5. A bond formed between two atoms that share electrons is called it p. 33. 10. When water molecules dissociate, they form and ions. p. 32. bond. p. 28. bonds form between oppositely charged atoms of a(n) polar covalent bonds of…

5cd_i-5c7IV_IVquz8U4U02epq7z4kBnpYZ5iA/edit & nsions Help EB Ga... estions: 1 2 11 + BIU Key Words: global warming et 3 1. Why is oxygen NOT a greenhouse gas? A 4 > DOE-E X-E greenhouse gas 6 infrared energy 3. The atmosphere on the planet Venus is almost 96 % carbon dioxide. What effect might its concentration of carbon dioxide have on the average surface temperature on Venus? is not a greenhouse gas because it is transparent to infrared light. and greenhouse gasses absorb oxygen infrared radiations. meaning it can not absorb heat. 2. Why is the effect of greenhouse gases in the atmosphere similar to the effect of glass surrounding a greenhouse? Page 3: The Structure of Greenhouse Gases Questions 4. What effect does an increase in the atmospheric carbon dioxide levels (and therefore rising temperatures) have on the amount of water vapor in the atmosphere? Why? 3 7 I 5. Both coal and natural gas can be burned to generate electricity. However, burning natural gas produces about half the…

hello. I found the question and answer to my question on the site. I need to know how to find the Ka value in the answer. The Ka value is not in my textbook and I can't even find it on google.  Please tell me how to solve this question or you can send me a link to a extensive list of compounds and the ka values     Select from the list below, the Kavalue of aluminium nitrate, Al(NO3)3. (You will have to do a bit of research to answer this question.)   A. 6.2 x 10-8 B. 1.8 x 10-5 C. 7.9 x 10-6 D. 7.5 x 10-3 check_circle Expert Answer thumb_up   thumb_down Step 1 Ka is known as the equilibrium constant of an acid which is defined as the ratio of product of 'concentration of all the product' to the product of 'concentration of all the  reactants'. Step 2 The reaction of Al(NO3)3 with H2O is : Al(NO3)3(aq) + 3H2O(l) --> Al(OH)3(s) + 3HNO3(aq) The standard value of Ka for Al(NO3)3 at 25°C is 1.8 x 10-5. So, The correct option is (B) : 1.8 x 10-5

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Just what does it imply when people talk about a "homogeneous structure?"

Select the single best answer. Consider the steps in coal gasification: C(coal) + H₂O(g) → CO(g) + H2(g) CO(g) + H₂O(g) → CO2(g) + H2(g) CO(g) + 3H2(g) → CH4(g) + H2O(g) AH'rxn = 129.7 kJ AH°rxn = -41 kJ AH'rxn=-206 kJ Identify the overall reaction for the production of methane, CH4.

2. If one MMBTU worth of pure methane is sold to you, a. What will it weigh in kg? b. At standard temperature and pressure how much volume will the gas occupy in cubic feet? c. If this gas is fully burnt how many kg of CO2 will be released? d. If 3% of what was sold to you, leaks out as methane prior to combustion and the remaining undergoes full combustion - what is the combined GHGeq (from both combustion and from leakage) of that gas sold to you if we assume a 20-year global warming potential as opposed to 100-years? e. Research the GHG emissions that are used for producing one MMBTU of heat from coal.

The initial step in the formation of O3 from O2 in the stratosphere is the absorption of light by 02, which causes it to split into O atoms. The balanced chemical equation for this process is 02 (g) → 2 0 (g) If AHP for O (g) is +249.17 kJ/mole, what wavelength of light, in nm, must be absorbed by 02 to make this reaction occur? Enter only the numerical portion of your answer in the space provided, to the correct number of significant figures; do not enter the units.

Given the following data: 2 H₂(g) + O₂(g) → 2 H₂O(g) C₂H4(g) + 3 O₂(g) → 2 CO₂(g) + 2 H₂O(g) 2 CzHo(g) +7 Oz(9) → 4 CO,(g) + 6 H20(g) calculate AH for the reaction C₂H₂(g) + H₂(g) → C₂H₂(g). kJ ΔΗ = −484 kJ AH-1323 kJ ΔΗ = -2857 kJ

16. The combustion of gasoline (octane) in a car engine can be represented by the following equation: 2C3H18(1) + 2502(g) a. What mass of oxygen is used up to burn a full tank of 36.00 kg of gasoline? Text --> 16CO2(g) +18H20(g) b. Why might a vehicle that is calibrated to run perfectly at sea level run poorly at higher elevations? Text Тext According to the Canadian Automobile Association, the average Canadian drives 20,000 km/yr. C. Assuming that distance, how many more kg of carbon dioxide are added to the atmosphere each year by a Toyota Tacoma (fuel economy of 12.8 L/100 km) than a Toyota Prius (4.52 L/100 km)? The density of gasoline is 0.719 kg/L.

Write a paraphrase of the following passages.1. Bats are in the limelight these days because they are rumored to be the source of COVID-19, the virus that caused the coronavirus pandemic. But that is just part of their story. Bats turn out to be miraculous creatures. Their ability to age without decrepitude or cancer, as well as fight off a multitude of infections, are giving us clues about how to do the same for ourselves.

Why are ducks waterproof? It’s because they produce copious amounts of oils from their uropygial glands and spread it across their feathers. In this exercise, we’ll be investigating the molecular structure of one of these preen oils to determine how it keeps ducks dry. Q.5 - Preen oil is actually a complicated mixture of many different organic compounds, such as the structure seen previously.. Ornithologists have determined that birds often use preen oil compounds for scent recognition. Below, several different chemicals isolated from preen oil are shown, along with their vapor pressures at room temperature. p-cymene has the highest vapor pressure, meaning it is the most easily evaporated compound of the three listed. Explain why p-cymene has a higher vapor pressure at room temperature compared to the other compounds. Make sure to explain what holds the p-cymene in the sample. (Image attached)

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