Please Help me with these two questions. Question $45$

Incorrect

Mark $0\mathrm{.}00$ out of $1\mathrm{.}00$

Calculate the half$-$life $($in s$)$ of a first$-$order reaction if the concentration of the reactant is

$0\mathrm{.}0633M18\mathrm{.}9s$ after the reaction starts and is $0\mathrm{.}0286M80\mathrm{.}3s$ after the reaction starts.

Answer:

Question $46$

Incorrect

Mark $0\mathrm{.}00$ out of $1\mathrm{.}00$

Suppose the half$-$life is $34\mathrm{.}0s$ for a first order reaction and the reactant concentration is

$0\mathrm{.}0592M40\mathrm{.}6s$ after the reaction starts. How many seconds after the start of the reaction

does it take for the reactant concentration to decrease to $0\mathrm{.}0082M?$

Answer: