9. (5 points) An over-all reaction consists of two elementary reactions which are 2NO2(g) → NO(g) + NO(g) -> slow (the rate constant is k) NO3(g) + CO(g) → NO2(g) + CO2(g) fast Write the rate law for the over-all reaction. 10. (5 points) The rate of a chemical reaction 2A + B2C (k is the rate constant) is expressed by Rate = k [A][B]" and we want to determine the orders of the reaction m and n from the results of the following two experiments. (Exp 1) The rate is tripled when while the concentration of B is tripled while the concentration of A is fixed. (Exp 2) The rate is quadrupled when the concentration of A is doubled while the concentration of B is fixed. What are m and n? 11. (5 points) The rate law for A2 → 2A reaction is given by == Rate = -d[A2]/dt = k[A2], first order to A2. (a) Can you express the concentration c of A2 at time t as a function of k, c, and t? The concentration of A2 at t=0 is Co. (b) Suppose it takes 1 second for the concentration (mol ) of A₂ to be 25% of the initial concentration. What is the rate constant k? (Don't forget to put the unit and show your work. 4

A proposed mechanism for one of the pathways for the destruction of ozone in the atmosphere is: step 1 slow: 03 + NO → NO2 + O2 step 2 fast: NO₂+0 → NO + O₂ (1) What is the equation for the overall reaction? Use the smallest integer coefficients possible. If a box is not needed, leave it blank. + + (2) Which species acts as a catalyst? Enter formula. If none, leave box blank: (3) Which species acts as a reaction intermediate? Enter formula. If none, leave box blank: Rate = (4) Complete the rate law for the overall reaction that is consistent with this mechanism. (Use the form k[A][B]"..., where '1' is understood (so don't write it) for m, n etc.)

Ancient statues made of marble (a form of calcium carbonate) are damaged by acid rain because the reaction between the sulfuric acid in the rain and calcium carbonate produces soluble calcium sulfate, which washes away: CaCO3(s)+H₂SO4 (aq) CaSO4 (aq)+CO₂(g) +H₂O(1) Suppose an engineer decides to study the rate of this reaction. She prepares four reaction vessels by adding 162.5 g of solid calcium carbonate and 56. mL of 5.0 M sulfuric acid solution to each, and then filling the remainder of the vessel with distilled water. The volume and temperature of each vessel is shown in the table below. Arrange the reaction vessels in decreasing order of initial rate of reaction. In other words, select a "1" next to the vessel in which the engineer can reasonably expect the initial rate of reaction to be highest, a "2" next to the vessel in which the initial rate of reaction would be next highest, and so on. vessel volume temperature B C D 4.0 L 2.0 L 8.0 L 1.0 L 24 °C → 24. °C 24. °C 24 °C…

11. (8 pt) Enrofloxacin is a drug used for dogs and cats to combat bacterial infections.A dog was given an intramuscular injection of enrofloxacin, and just after the injection, the initial concentration of the drug in the dog’s blood was 5.8Í10–6 M. If the enrofloxacin disappears in a first-order process with a half-life of 4.6 hours, how many hours will it take for the enrofloxacin concentration of drop to one-eighth (1/8th) of the initial concentration (i.e., 0.125[A]0)?

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

Determine the reaction-rate law and the value of the rate constant. 2 NO(g) + Br2(g) → 2 NOBr(g)   Answer: rate of reaction = (1.30 × 10–3 M–2 . min–1)[NO]2[Br2] I need steps, I don't know how to get the exponent for NO as 2, i keep getting it as a first order reaction.

please help and make things clear thank you so much (:

For the following reaction: 3I2(s) + PbO(aq) ® PbI4(s) + I2O(g).  If the mass of I2O changes from 2.5 g at t= 0s to 13.7 g at t= 25s, what is the average rate of reaction with respect to I2 in g/sec?             Your answer should follow the format:          a) rate with respect to I2O in g/s          b) rate with respect to I2O in mol/s          c) rate with respect to I2 in mol/s          d) rate with respect to I2 in g/s

In the reaction below, if the rate of formation of nitrogen( Δ[N2]/Δt  = 0.540 M/s)  what is the rate of formation of water( Δ[H2O] / Δt )? 4NH(subscript 3)+3O(subscript 2) ---> 2N(subscript 2) + 6H(subscript 2)O

A student sets up two reactions Reaction 1 uses 0.250 mol/L of reactant, and Reaction 2 uses 0 500 mol/L of reactant. How many times faster is Reaction 2 compared to Reaction 12 Express your answer as a multiple of the rate for Reaction 1 to three significant figures. Note that Reaction 1 is already written for you, so just enter the number.