Question

What is the rate of the reaction if 2 moles of substance A react with 1 mole of substance B in 10 seconds, assuming it follows first-order kinetics with a rate constant of 0.5 s^-1?

Answer 1

To calculate the rate of the reaction, we can use the first-order rate law equation:Rate = k[A]where Rate is the reaction rate, k is the rate constant  0.5 s^-1 , and [A] is the concentration of substance A.First, we need to determine the concentration of substance A. Assuming the reaction takes place in a 1-liter container, the concentration of A would be:[A] = moles of A / volume[A] = 2 moles / 1 L[A] = 2 MNow, we can plug the values into the rate law equation:Rate =  0.5 s^-1  2 M Rate = 1 M/sThe rate of the reaction is 1 M/s.