Chemistry
posted by Josh .
a certain first order decomposition reaction has a halflife of 15.0 minutes. What is the rate constant for this reaction?
what is the time it will take for the reaction to reach the 10% completion point?

k = 0.693/t_{1/2}
ln(No/N) = kt
No = 100
N = 90
k from above.
Solve for t.