Unit II- Assessment

16- During the (until 1910), the idea about the cause of earthquakes varies between mythology and natural phenomena. a) O maturated period b) O historical period C)) early period d) O modern period O Boş bırak KÔnceki 16/20 Sonraki> Kapat

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.

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 following are Federal Air Quality Standards for the US CO: 35ppm (1-hour) NO2: 0.053ppm (Actually NOx but please use NO2 to calculate) 03: 0.075 ppm SO2: 75ppb (1-hour) a) Calculate the air concentrations in ug/m³ corresponding to the standards. Detail your calculations. b) What would be the mass concentrations on Mars if the little green men would apply the same standards in terms of mixing ratio. Explain your assumptions.

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

from 4 to 6 please   thank you

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

The density of moist air (ideal gas mixture) at 20°C temperature and 700 mmHg pressure was found to be 1.1 g/lt. Calculate the partial pressure of water vapor in this air. Additional data: MA(H2O)18, MA (Air)29

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

Please help me to measure the volume of hydrogen gas in this eudiometer.

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.

Activity 1-1 part 3

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.

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.

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.

5 A chemistry lab with 22,000 cubic feet was contaminated with hydrogen sulfide. What will the average H2S concentration be if dilution air is provided for 15 minutes? Assume STP, q = 0, C1 =1,500 ppm, mi = 1.0, and Qd = 2000 scfm. You need to include what equation you use, show you step-by-step calculations and include appropriate unit (such as scfm or acfm) for credits

We were given an activity about observing 2 balloons. 1 balloon is in the basin with cold water and the other balloon is in the basin with hot water we were task to observe it after 1 minute and after 3 minutes and wrote our observation which is the balloon in the basin with hot water expanded and the balloon in the basin with cold water shrunk. The question is how would we apply our learning on this activity in real life?

Time Left:0:55:00 A student completes the experiment The Universal Gas Constant and obtains the following data for one trial. mass of magnesium (g): Initial gas volume (ml): Final Volume (mL): Temperature (°C): Atmospheric pressure (inHg): Ah (cm of water): F3 80 모 Calculate the partial pressure of hydrogen, PH2, for this trial. Give your answer in torr (mmHg). 1 in Hg = 25.4 mmHg 1 cm water = 0.735559 mmHg 1 mol Mg = 24.305 g Mg TABLE D-4 TEMP 1_DEG₁_C_1 1 3 I 1 1 Q F4 0 1 = 2 3 4 5 6 7 8 10 11 12 13 14 0.0 0.1 0.0326 0.00 35.30 21.3 30.21 16 17.13 F5 6.100 | 6.143 1 6.544 1 6.589 0.2 1 VAPOR PRESSURE OF HATER 0-30 DEG. C IN MM HG 1 4.579 4.612 4.646 | 4.924 | 4.959 4.995 15.291 4.660 4.714 5.0315.068 5.329 5.367 5.406 5.445 4.7484.783 4.818 5.104 | 5.141 | 5.178 5.484 5.523 5.563 5.888 5.930 6.230 16.274 6.318 5.363 15.683 15.723 | 5.764 | 5.8051 5.146 6.186 6.636 5.972 1 6.0141 6.057 1 6.407 1 6.453 6.498 1 6.82 | 6.729 6.776 6.823 | 6.871 | 6.919 | 6.967 1 T T 1 I T I 1 17.0167,064…

Be sure to answer all parts. Nitric oxide occurs in the tropospheric nitrogen cycle, but it destroys ozone in the stratosphere. (a) Write equations for its reaction with ozone and for the reverse reaction. Include the physical states of the reactants and products. Forward reaction: Reverse reaction: (b) Given that the forward and reverse steps are first order in each component, write general rate laws for them. Let kç be the rate constant of the forward reaction and k. the rate constant of the reverse reaction. Forward rate law: Rate= kf Reverse rate law: Rate, = k, (c) Calculate AG for the forward reaction at 280. K, the average temperature in the stratosphere. (Assume that the AH and S values do not change with temperature.) kJ

3- The concentration of hydrogen sulfide "H₂S" is 55 ppb at a location 150 m downwind from an abandoned oil well. What is the rate of H₂S emission from the well if the winds are 2.7 m/s on a sunny June afternoon, in grams per second? Assume ground-level emission and rural conditions.

Ozone in the troposphere is formed by the following steps: NO2 → NO + O (1) 0 + 02 → 03 (2) The first step is initiated by the absorption of visible light (NO, is a brown gas). Calculate the longest wavelength required for step 1 at 25°C. nm

N2 in the atmosphere Plants Process X + NH3 in soil NH," NO2 NO3 State THREE (3) impacts that can be associated with process X that would require mitigation strategies in the long term.

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

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

- What chemical species in the atmosphere acts like nature’s cleaning agent? Give the symbol and name. -What is one physical mechanism (i.e., not a chemical reaction) through which trace gases can be removed from the atmosphere?