Given the following Mechanism: Step 1: H2O2(aq) + I–(aq) → H2O(l) + OI–(aq) (slow) Step 2: H2O2(aq) + OI–(aq) → H2O(l) + O2(g) + I–(aq) (fast) Identify the catalyst in the reaction

The reaction of 2N2O5(g) → 4NO2(g) + O2(g) is experimentally determined to be zero order. What experimental data would support this conclusion? I . Plotting 1 / [N2O5] vs. time would be linear II. The half-life is independent of the initial concentration III. Doubling the initial concentration of N2O5 would have no effect on the initial rate.

Nitric oxide and nitrogen dioxide are found in photochemical smog. Nitrogen dioxide is formed from nitrogen monoxide in the exhaust of automobile engines. A possible mechanism for this reaction is given below, where equilibrium is quickly established in steps 1 and 2. What is the rate law predicted by this mechanism? (you may keep the k general) Overall Reaction: 2NO(g) + O2(g) → 2NO2(g) Mechanism: Step 1 (fast, equilibrium): NO + NO ↔ N2O2 Step 2 (fast, equilibrium): N2O2 ↔ N + NO2 Step 3 (slow): N + O2 → NO2

The reaction is run at two temperatures where temperature 1 is higher than temperature 2. Which relationship is correct for either rate constant (k1 or k2) or activation energy (Ea,1 and Ea,2)?

The initial rate data for the reaction 2N2O5(g) <--> 4NO2(g) + O2(g) is shown in the following table. Experiment [N2O5] (M) Rate (M/s) 1) 2.56 x 103 450 2) 1.28 x 102 22.5 Determine the value of the rate constant for this reaction k =

The initial rate data for the reaction 2N2O5(g) <--> 4NO2(g) + O2(g) is shown in the following table. Experiment [N2O5] (M) Rate (M/s) 1) 2.56 x 103 450 2) 1.28 x 102 22.5 What would be units for k

After 55 years, what mass (in g) remains of a 200.0 g sample of a radioactive isotope with a half-life of 10.0 years?

The rate of a reaction is found to double when the concentration of one reactant is quadrupled. The order of the reaction with respect to this reactant is ________

The following reaction of  [A] has a  rate constant of 0.0250 M s-1: A → B If in 33 seconds the A reacts by 70.0%.  What would be the half life ? .

The rate at which popcorn pops was measured at two different temperatures. How many times faster does the popcorn pop at 250°C compared with that at 210°C when the activation energy is 53.8 kJ/mol?

Given the following hypothetical reactions with K1 and K2 values : 1). 1 A (g) + 1/2 B(s) ⇌ 1D (aq) K1 = 5 2). 2 C(g) + 2 D (aq) ⇌ 4A(g) + 2 B(s) K2 = 2 What is value of the equilibrium constant that will result from the above reactions: 3). 4 A(g) + 2B ⇌ C(g) + 3D (aq) K3 = ?

When a certain compound A is heated it decomposes according to the following reaction: 2 A(s) ⇌ B(s) + 2C(g) + D(g) If sufficient Solid A is placed in a container and heated to 90°C, the total pressure of the gases is 2.00 atm. What is the value of Kp at that temperature?

Consider the equilibrium: 2ICl(g) ⇄ I2 (g) + Cl2 (g) Kc= 15.0 If initially z moles of ICl, 1mole of I2 and 2 moles of Cl2 were placed in a 1.0 L container at 10 oC and as equilibrium is reached concentration of I2 decreases by 20%, calculate the number of moles ICl initially present.

Based on Le Châtelier's principle, increasing volume at constant temperature in the following reaction will decrease the concentrations of reactants.

Which change in the system will not affect the equilibrium in the reaction below? N2O5(g) ⇌ NO2(g) + NO3(g)

For a chemical reaction at equilibrium, which of the following will not change the value of the equilibrium constant K? I. Changing the temperature II. Changing the total concentration of reactants or products III. Changing the total volume

For the reaction of nitrogen and oxygen to form nitrogen dioxide, N2(g) + 2O2(g) ⇌ 2NO2(g) Kc = 4.0×103 If the reaction mixture is found to contain 2.0 M NO2 and 0.10 M N2 and 0.10 M O2, what is the value of Q and what does this mean?

Consider the following reaction at equilibrium: 2SO2 (g) + O2 (g) <--> 2SO3 (g) ΔH° = -99 kJ Le Châtelier's principle predicts that a(n) decrease in temperature will result in ________.

According to Brønsted and Lowry, which one of the following is not a conjugate acid-base pair?

Among the following binary halogen acids HF, HCl, HBr, HI, the formula that represents the strongest acid is =