Katearias9Victor
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Please need some help understanding this

The decomposition of XY is second order in XY and has a rate constant of 7.02 x 10^-3 M^-1 x s^-1 at a certain temperature.

AWhat is the half-life for this reaction at a initial concentration of 0.100 M?
CIf the initial concentration of XY is 0.150M, how long will it take for the concentration to decrease to 0.062 M?

Verified Answer :

taskmasters

This type of problem is known to be the rate of decay or
decomposition. In dealing with this type of problem, we would let Q to be the amount
present at any time, Qo as the initial amount, k as the rate constant and then
t as the number of hours to reduce the initial amount to the present amount. The
equation would be Q=Q0 times e^ -kt.

In letter a, the answer would be 98.7389 seconds. Meanwhile
in letter b the answer is 125.8548 seconds. 

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