The **rate constant** $k$ in a rate law equals the rate of reaction when:
AAll reactant concentrations are zero
BAll reactant concentrations are unity
CTemperature is zero kelvin
DTime is zero
Answer & Solution
Correct answer: B. All reactant concentrations are unity
Putting unit concentrations into rate = $k[A]^x[B]^y$ gives rate = $k$. So $k$ is the rate at unit concentrations of all reactants.
Related questions
It is observed that for many reactions the rate constant nearly doubles for a rise in tempThe half-life for the radioactive decay of carbon-14 is 5730 years and decay is first ordeIn a pseudo first order reaction, [A]/mol L^-1 reads 0.31 at t = 30 s and 0.17 at t = 60 sIn collision theory, what is meant by the collision frequency (Z)?According to collision theory, in the modified rate expression Rate = P Z_AB e^(-Ea/RT), wHow does a catalyst increase the rate of a chemical reaction?The first order rate constant for decomposition of ethyl iodide is 1.60 x 10^-5 s^-1 at 60The rate constants of a reaction at 500 K and 700 K are 0.02 s^-1 and 0.07 s^-1 respective