# Drug X has an expiration date that is 1.5 years after the date it was manufactured. Drug X decomposes following the reaction below. Assume the decomposition follows first order kinetics.                                X ---->  Y +  2 Z 1) A bottle contains pills of X that were manufactured 5.00 years ago. The drug is analyzed and it is found that 95.0% of X has not decomposed. What is the half life for the dceomposition of X in years?  2) One of the pills contains 10.0 mg of X. The molecular weight of X is 245 g/mol and the molecular weight of Z is 100g/mol. How many years will it take for enough X to decompose so as to produce 2.8 mg of Z?

Question

Drug X has an expiration date that is 1.5 years after the date it was manufactured. Drug X decomposes following the reaction below. Assume the decomposition follows first order kinetics.

X ---->  Y +  2 Z

1) A bottle contains pills of X that were manufactured 5.00 years ago. The drug is analyzed and it is found that 95.0% of X has not decomposed. What is the half life for the dceomposition of X in years?

2) One of the pills contains 10.0 mg of X. The molecular weight of X is 245 g/mol and the molecular weight of Z is 100g/mol. How many years will it take for enough X to decompose so as to produce 2.8 mg of Z?