Unit II- Assessment

i)16O and 18O are two different isotopes of oxygen. What is  ONE IS TRUE about 18O? it less easily evaporated than 16O it is more volatile and reactive than 16O it is lighter than 16O it is more commonly occurring than 16O II) Ice core samples taken from Antarctica have been used to estimate changes in surface temperatures and the atmospheric concentrations of carbon dioxide and methane. This data indicates that when the temperature is relatively warm, the amounts of carbon dioxide and methane are ___________ Select one: relatively low (negative correlation) sometimes high, sometimes low (no correlation) relatively high (positive correlation) III) The answer to the previous above question indicates that ___________ . Select one: high atmospheric concentrations of carbon dioxide and methane might lead to warmer temperatures high atmospheric concentrations of carbon dioxide and methane might lead to cooler temperatures there is no…

The combustion of gasoline (octane) in a car engine can be represented by the following equation: 2C3H18(1) + 2502(g) --> 16CO2(g) +18H2O(g) a. What mass of oxygen is used up to burn a full tank of 36.00 kg of gasoline? b. Why might a vehicle that is calibrated to run perfectly at sea level run poorly at higher elevations? C. According to the Canadian Automobile Association, the average Canadian drives 20,000 km/yr. 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.

ecollege.com/course.html?courseld=16985674&OpenVellumHMAC=d4abff74a80d41d197d6c57220120253#10001 EUsing Microwave Radiation to Heat Coffee 9 of 29 M Review | Constants | Periodịc Table Microwave ovens use microwaye radiation to heat food. The microwaves are absorbed by the water molecules in the food, which is transferred to other components of the food. As the water becomes hotter, so does the food. Part A Suppose that the microwave radiation has a wavelength of 12.4 cm. How many photons are required to heat 295 mL of coffee from 25.0 °C to 62.0 °C? Assume that the coffee has the same density, 0.997 g/mL, and specific heat capacity, 4.184 J/(g - K), as water over this temperature range. Express the number of photons numerically. > View Available Hint(s) ? photons Submit Provide Feedback Next> P Pearson 11:26 AM 72°F Sunny 11/25/2021 20 Cop

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Application of Material 100 Okay, you can get out your books, notes, or whatever else you would like (okay, except other people). Show your work, as I will give credit for anything you do correctly (if you are need it is easier for me to determine if you do something correctly). If you need to make assumptions, specify what they are. 1. A reaction 2A+B P was determined to be 2/3 order with respect to B, and Oth order with respect to A, with a rate constant of kr 3.892 x 10-5 M1/3 s-1. (35 points) = - (a) For this reaction, derive the integrated rate law with respect to A, B, and P. (b) For this reaction, determine the amounts A, B, and P present after 500, 1000, 1500, 2000, 2500, and 3000 seconds (assuming no intermediate exists). [A] = [B]o = 1.00 x 10-2M. (You might want to use excel or similar software to do this. (c) Based on your data, use excel or similar software to prepare a plot of concentration vs time for A,B, and P. (d) Determine the rate constant for the reaction. (e)…

Suppose a quantity is described by the function y(t) = 30,000e-0.05t, where t is measured in years. Find the half-life of the quantity.

Select from the following which steps are involved in the natural production of ozone in the stratosphere. (You may select multiple if needed) O 3 02 (g) → 2 03 (g) + photon3 0;(g) –20:(g) + photon O O2 (g) + O (g) + M → O3 (g) + M+heato,g) + O(g) - M→ 0,(g) + M+heat 0 0 (g) + 0 (g)+0 (g) → O3 (g) + heatog) - 0(g)- Og) → 03(g) + heat D 02 (g) + photon → 2O (g)02(3) + photon →2013) O 02 (g) + 0 (g) + photon → O3 (g)0(g) -O)+ photon

Reducing NO Emissions Adding NH3 to the stack gases at an electric power generating plant can reduceNOx emissions. This selective noncatalytic reduction (SNR) process depends on the reaction between NH3 (an odd-electron compound) and NO.$$4NH3​(g)+6NO(g)5N2​(g)+6H2​O(g)The following kinetic data were collected at 1200 K.  Experiment [NH3] (M) [NO] (M) Rate (M/s) 1 1.00x10-5 1.00x10-5 0.120 2 2.00x10-5 1.00x10-5 0.240 3 2.00x10-5 1.50x10-5 0.360 4 2.50x10-5 1.50x10-5 0.450   What is the rate-law expression for the reaction? Do not add multiplication symbols to your answer.   $$Rate=

In the stratosphere, hydroxyl radical (OH) is produced and consumed by the following reactions: k1O* + H2O –––> 2OH k2OH + CH4 –––––––> H2O + CH3 k2-bottom = 7.9 x 10-16 cm3 molec-1 s-1 at the b k2-top = 4.6 x 10-15 cm3 molec-1 s-1a.(3) Based on the rate laws for these reactions, write an equation for the steady-state concentration of hydroxyl radical in the stratosphere.

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.

Module 14 Discussion: Logarithmic Application A Radiative Forcing Radiative forcing, R, measures the influence of carbon dioxide in altering the additional solar ration trapped in Earth's atmosphere. The International Panel on Climate Change (IPCC) in 1990 estimated k to be 6.3 in the radiative forcing equation R = k In(), where Co is the preindustrial amount of carbon dioxide and C is the current level. (Data from Clime, W., The Economics of Global Warming, Institute for International Economics, Washington, D.C.) (a) Use the equation R = 6.3 In() to determine the radiative forcing R, in watts per square meter (W) to the nearest tenth, expected by the IPCC if the carbon dioxide level in the atmosphere doubles from its preindustrial level. (b) Determine the global temperature increase T, in degrees Fahrenheit to the nearest tenth, that the IPCC predicted would occur if atmospheric carbon dioxide levels were to double, given T(R) = 1.03R. Search entries or author Unread 96 4444 ↑ Oll 7…

) Statistics (AA) - Live Online O Course Home C If Solar Radiation Is 1140 W/m2 X O Study.com - Search for courses, x O 8 https://openvellum.ecollege.com/course.html?courseld= 16914186&OpenVellumHMAC=c662ec09ac8023bd 1b971c039afd0082#10001 View Available Hint(s) E = kJ/mol Submit Previous Answers X Incorrect; Try Again; 4 attempts remaining Part B Y-ray photons with a wavelength of 2.54x10-5 nm Express the energy numerically in kilojoules per mole. View Available Hint(s) here to search L 52% Home End Insert Delete %23 2$ 4 6 7 8 Backspace Y D F G H J KL Enter C VB NM 5

段階的に解決し、 人工知能を使用せず、 優れた仕事を行います ご支援ありがとうございました SOLVE STEP BY STEP IN DIGITAL FORMAT DON'T USE AI | DON'T USE AI | DON'T USE AI | DON'T USE AI | 6. The depletion of ozone (O_3) in the stratosphere has been a topic of great concern among scientists in recent years. It is believed that ozone can react with nitric oxide (NO) that comes from aircraft emissions at high altitudes. The reaction is 03 + NO → O2 + NO₂ If 0.740 g of Os reacts with 0.670 g of NO, how many grams of NO_2 will be produced? Which compound is the limiting reactant? Calculate the mass of the excess reactant that is recovered by finish the reaction.

Dinitrogen monoxide (N₂O; nitrous oxide) is a greenhousegas that enters the atmosphere principally from natural fertilize rbreakdown. Some studies have shown that the isotope ratios of ¹⁵N to ¹⁴N and of ¹⁸O to ¹⁶O in N₂O depend on the source, which can thus be determined by measuring the relative abundance ofmolecular masses in a sample of N₂O.(a) What different molecular masses are possible for N₂O?(b) The percent abundance of ¹⁴N is 99.6%, and that of ¹⁶O is 99.8%. Which molecular mass of N₂O is least common, andwhich is most common?

rsity o... ingsbo... kboard... ARED4 ethod? 7... F2 Remaining Time: 1 hour, 22 minutes, 23 seconds. Question Completion Status: A Moving to the next question prevents changes to this answer. Question 1 # The angle of the water molecule (H₂O) is 180 degrees 120 degrees 100 degrees 90 degrees 109 degree A Moving to the next question prevents changes to this answer. MAR 14 80 F3 SA $ 000 F4 tv % F5 NA MacBook Air 22 F6 ∞r F7 45.113

Given the information about the following acids:i= HW pKa = 2ii= HX pKa = 6iii= HY pKa = 10iv= HZ pKa = 20Which these acids will react almost completely with hydroxide ion to form water?

Nitric oxide reacts with hydrogen to release large amounts of chemiluminescence with the characteristics of the highly cytotoxic species. The following data were measured for the reaction of nitric oxide with hydrogen: Data number 1 2 3 2 NO(g) + 2 H₂(g) → N₂(g) + 2 H₂O(g) [NO] (M) 0.1 0.1 0.2 [H₂] (M) 0.1 0.2 0.1 Based on the data, (a) Determine the rate law for this reaction. (b) Calculate the rate constant. (c) Calculate the rate when [NO] = 0.050 M and [H₂] = 0.150 M Initial rate (M/S) 1.23 x 10-³ 2.46 x 10-³ 4.92 x 10-³

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The time flight of an CO+ (MW = 27.99) was 10.489 μs. What would it be the time flight (in μs) of Cl2+ (MW = 70.91)?

Could you give me some explanation, the correct answer is at the bottom of the question.

How many years will it take for carbon-14 to diminish to 1% of its original amount after the drag of a plant or animal?

OnCourse Connect Assessment: Chemistry x Copy of spread_of_islar x = The Spread of Islam -G x M Inbox (904) - aarojame A Classes boncourseconnect.com/assessment/1651879/5287e2a3-0d0b-e2c0-c15c-3e68a37149b4 D TPSS Bookmarks CHEMISTRY BENCHMARK TEST 01 CHEMISTRY I 12-7 (AARON JAMES, ID: 12390724) A student dissolved 15 grams of pure acetic acid (CH,COOH) in enough water to make 100. milliliters of solution. Given the atomic masses provided on the periodic table, what is the molarity (M) of the acetic acid solution? a 0.025 molar D0.40 molar © 2.5 molar O 4 molar A B B 1 2 4 5 6 7 8 9 10 3. O Save/Exit 4 sn TESS