A sample of l-131 decays to 1.0 gram in 40.35 Days. What was the mass of the original sample? (half-life - 8.07 days) *
32 g
809
4.0 g
10 16g

The activation energy for this reaction is 75 kj·mol–1. the enzyme catalase (found in blood) lowers the activation energy to 8.0 kj·mol–1. at what temperature would the non-catalyzed reaction need to be run to have a rate equal to that of the enzyme-catalyzed reaction at 25°c?