The Decomposition of a Solution of Hydrogen Peroxide, H₂O₂, Was

Multiple Choice

The decomposition of a solution of hydrogen peroxide, H₂O₂, was monitored over several days. Initially, hydrogen peroxide was present at a concentration of 1 mol L^-1; after four days the hydrogen peroxide was present at a concentration of 0.5 mol L^-1. What is the rate of the reaction for the decomposition of hydrogen peroxide?

A) 1.40  10^-6 mol L^-1
B) 1.40  10^-9 mol L^-1 s^-1
C) 1.40  10^-6 mol L^-1 s^-1
D) 1.25  10^-1 mol L^-1 day^-1
E) 8.68  10^-5 mol L^-1 min^-1