ACC-4594-Practice Problems

Determine whether the following statements are true or false, and explain your answer in one sentence. a) The rate law for an overall reaction 2A (g) -> B (g) is: Rate = k[A]^2 b) The rate law for an elementary step 2A (g) -> B (g) is: Rate = k[A]^2 c) The rate of an overal reaction is the rate of the slowest elementary step within its mechanism.

Chlorine dioxide reacts in basic water to form chlorite and chlorate according to the following chemical equation: 2C1O₂(aq) + 2OH(aq) → CIO₂ (aq) + CIO3(aq) + H₂O(1) Under a certain set of conditions, the initial rate of disappearance of chlorine dioxide was determined to be 2.30 x 10-1 M/s. What is the initial rate of appearance of chlorite ion under those same conditions? O 5.75 x 10-2 M/s O 1.15 x 10-¹ M/s O 2.30 x 10-1 M/s O 4.60 x 10-¹ M/s O 9.20 x 10-1 M/s

Explain the chemistry of the 2020 Beirut explosion.

What should be the best type of fire extinguisher in the following section of the laboratory and support your answer.   AAS-Graphite Assembly Room – Chemistry Laboratory HPLC Room -Chemistry Laboratory GCMS Room - Chemistry Laboratory Inoculation Room-Microbiological Laboratory Acid Digestion Room – Chemistry Laboratory DNA Amplification Room-PCR Laboratory Balance/Weighing Room-Chemistry Laboratory Hazardous Waste Storage Area – Chemistry Laboratory

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Photochemical smog occurs in warm, dry and sunny climate. One of the following is not amongst the components of photochemical smog, identify it. NO 2 B c) Unsaturated hydrocarbon sO 2.

My quiz timed out and I was unable to answer the first question in time. I was also unable to answer the second correctly. This concept confuses me quite a lot and I'm not sure how to solve it in a step-by step process

this is my homework practice assignment that is very important and I really need help please give the answer for the 2 questions which I have highlighted with the green color I need a step by step explanation please please please help me.

DDT (molar mass = This ban was brought about due to the persistence of DDT in many different ecosystems, leading to high accumulations of the substance in many birds of prey. The insecticide was shown to cause a thinning of egg shells, pushing many birds towards extinction. If a 20-L drum of DDT was spilled into a pond, resulting in a DDT concentration of 354.49 g/mol) was a widely used insecticide that was banned from use in the United States in 1973. 8.66 x 10-5 M, how long would it take for the levels of DDT to reach a concentration of 1.41 x 10-7 M (a level that is generally assumed safe in mammals)? Assume the decomposition of DDT is a first-order process with a half-life of 56.0 days. Time =|| days

List two types of chemical compounds that must be present in the air for photochemical smog to form.What are the most common sources of these compounds?

Chlorine dioxide reacts in basic water to form chlorite and chlorate according to the following chemical equation: 2C1O₂(aq) + 2OH (aq)- ClO₂ (aq) + CIO, (aq) + H₂O(1) Under a certain set of conditions, the initial rate of disappearance of chlorine dioxide was determined to be 2.30 x 10 M/s. What is the initial rate of appearance of chlorite ion under those same conditions? 5.75 x 10-² M/s 4.60 x 10-¹ M/s A B 1.15 x 10-¹ M/s 2.30 x 10-¹ M/s E 9.20 x 10-¹ M/s

4PH3 P4 + 6H₂ What is the rate of disappearance of PH3 from 0 to 75 seconds? Time [PH₂] [P4] [H₂] 0 2.00 0 0 75 1.50 ? ? 150 1.25 0.19 1.13 225 1.13 0.22 1.31 300 1.07 0.23 1.40 RatepH3 [?] x 10 M/s Coefficient (green) Exponent (yellow) Enter

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You conduct an experiment where everything but the number of cigarettes a person smokes is held constant You discover that a person smoking two packs of cigarettes a day quadruples (4x) the rate of aging over that of a one-pack-a-day smoker. Based on the data you have been given what is the value for n in the rate equation? Rate of aging = k [packs of cigarettes smoked]

Chlorine dioxide reacts in basic water to form chlorite and chlorate according to the following chemical equation: 2ClO2(aq) + 2OH–(aq) ClO2–(aq) + ClO3–(aq) + H2O(l). Under a certain set of conditions, the initial rate of disappearance of chlorine dioxide was determined to be 2.30 x 10–1 M/s. What is the initial rate of appearance of chlorite ion under those same conditions?

What is the role of carbon dioxide in air in Fresco Painting? What type of catalytic mechanism (heterogenous or homogenous) exist in Fresco painting? Why?

The rate law for the reaction A + B → C was found to be rate = k[A][B]. One experimental trial with the [A] = 0.26 M and (B] = 0.13 M had an initial rate of product formation of 0.36 M/s. What is the value of the rate constant for this reaction? Enter your answer as 0.0035 with no units. Use 2 significant digits. Answer:

For the reaction 2N2O5(g) ® 4NO2(g) + O2(g), the following data were collected.   t (minutes) [N2O5] (mol/L)   0 1.24 x 10–2   10 0.92 x 10–2   20 0.68 x10–2   30 0.50 x 10–2   40 0.37 x 10–2   50 0.28 ´ 10–2   70 0.15 ´ 10–2         The initial rate of production of NO2 for this reaction is approximately:   A) 6.4 x10–4 mol/L • min   B) 3.2 x10–4 mol/L • min   C) 1.24 x 10–2 mol/L • min   D) 1.6 x 10–4 mol/L • min   E) none of these

A vehicle manufacturing company forms a plan to begin the production of vehicles with catalytic converters. Which is the best description of the regulation or program the company is trying to accommodate? A an effort set in place to stop public school bus drivers from running the engine when the vehicle is not in motion an effort set in place to allow the EPA to regulate emissions from motor vehicles in the United States C. an effort set in place to ensure that vehicles in the United States have an air pollution control device an effort set in place to encourage the manufacture of vehicles that have no emission control systems and no emissions from gasoline

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If 2.0 × 10-4 moles of  H2O2H2O2 in 50 mL solution is consumed in 3 minutes and   25  seconds, what is the rate of consumption of H2O2H2O2?  Express the rate in mol per liter·second to two significant digits.

Reaction 1 FeO(s) + CO(g) → Fe(1) + CO2(g) AG" > 0 Reaction 2: C(s) + CO2(g) → 2 CO(g) AGzn <0 Overall reaction: FeO(s) + C(s) → Fe(l) + CO(g) AG n < 0 Subm The chemical equations above represent the main reactions that occur during the production of Fe(l) under certain conditions. The overall reaction couples reactions 1 and 2, resulting in a < 0? thermodynamically favorable process. Which of the following best explains whether or not a particle diagram could represent how the coupling of reaction 1 and reaction 2 results in AG A particle diagram that represents the increase in the volume of gaseous product particles would be a good representation of how the coupling of reactions 1 and 2 results in a thermodynamically favorable process. A particle diagram that represents the decrease in the average kinetic energy of the particles would be a good representation of how the coupling of reactions 1 and 2 results in a thermodynamically favorable process. A particle diagram cannot represent…

Identify the oxidizing agent in the chemical reaction                    5Fe+2(aq) + MnO4-(aq) + 8H+(aq)                5Fe+3 + Mn+2(aq) + 4H2O(l)   The answer is ………………………………   Calculate the total number of atoms in 500 Ml OF 0.200 M KNO3 solution.     The answer is ………………………………                   Mg has three stable isotopes. Given a sample of Mg with the following masses and percent abundances: 24Mg:  23.9850 amu,   58.42% 25Mg:  24.9858 amu,   15.22% 26Mg:  25.9826 amu,   26.36% The average atomic mass (in amu) is ……………………   What mass of Na2SO4 is needed to prepare 350. mL of a solution having a sodium ion concentration of 0.125 M     The answer is ………………………

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Retype each equation into the adjacent box. Use the XY button for superscripts and the Xy button for subscripts. Use the right and left arrow keys on your keyboard to get out of either the superscript or the subscript mode. 2Na + Cl, → 2NACI L(s) + 2e → 21-(aq)

За. Bromine and methanoic acid react in aqueous solution. Br, (aq) + HCO0Н (ад) — 2Br (aq) + 2H" (аq) + Со, (g) The reaction was monitored by measuring the volume of carbon dioxide produced as time progressed. o 5 10 15 20 25 [Source: © International Baccalaureate Organization 2019] 30 20 40 60 80 100 120 140 160 Time / s [Source: © International Baccalaureate Organization 2019] Determine from the graph the rate of reaction at 20 s, in cm³ s1, showing your working. 3b. Outline, with a reason, another property that could be monitored to measure the rate of this reaction. 3c. Describe one systematic error associated with the use of the gas syringe, and how the error affects the calculated rate. 3d. Identify one error associated with the use of an accurate stopwatch. Volume of carbon dioxide / cm T m mm mo

A group of students enrolled in a Physical Chemistry Laboratory class performed an experiment on the THE STUDY OF AN ADSORPTION ISOTHERM: ACETIC ACID SOLUTIONS ON ACTIVATEDCARBON. The data gathered by the group are documented in the tables below. Solve for the unknown data.   answer 1,2,3

From the activity, answer guide number 5.