For the reaction 2AsH3(g) ⟶ As2(g) + 3H2(g), the reaction rate can be expressed in terms of the change in concentration of which of the following species?

A certain substance, X, decomposes. 55% of X remains after 110 minutes. How much X remains after 200 minutes if the reaction order with respect to X is zero order?

Given the concentration of H2O decreases from 0.80 M to 0.60 M between 25 s and 65 s, calculate the average rate of the reaction in M/s.

Given the concentration of H₂O changes from 0.50 M to 0.30 M between 25 s and 65 s, calculate the average rate of the reaction in M/s.

Consider the proposed mechanism for the decomposition reaction 2 H₂O₂(aq) → 2 H₂O(l) + O₂(g) in the presence of I⁻(aq). What is the rate law for this reaction?

For the zeroth-order reaction: A → products, what will happen to the rate of reaction if the concentration of A is doubled?

If an enzyme increases the rate of the hydrolysis reaction by a factor of 1 million, how much lower does the activation energy barrier have to be when sucrose is in the active site of the enzyme? (Assume that the frequency factors for the catalyzed and uncatalyzed reactions are the same.)

In the reaction 3 BrO⁻(aq) → BrO₃⁻(aq) + 2 Br⁻(aq), a plot of 1/[BrO⁻] vs. time is linear. What does this indicate about the order of the reaction with respect to BrO⁻?

Using the method of initial rates for the reaction A → B, if the initial concentration of A is doubled and the rate of reaction quadruples, what is the order of reaction with respect to A?