What is the half-life for this reaction at an initial concentration of 0.100 M?

Question

What is the half-life for this reaction at an initial concentration of 0.100 M?

The decomposition of XY is second order in XY and has a rate constant of 7.12*10-3M-1 at a certain temperature. What is the half-life for this reaction at an initial concentration of 0.100 M? How long will it take for the concentration of XY to decrease to 12.5% of its initial concentration when the initial concentration is 0.103 M? How long will it take for the concentration of XY to decrease to 12.5% of its initial concentration when the initial concentration is 0.200 M? If the initial concentration of XY is 0.150M, how long will it take for the concentration to decrease to 6.00 Times 10-2 Express your answer using two significant figures. If the initial concentration of XY is 0.050 M. what is the concentration of XY after 55.0b? Express your answer using two significant figures.

Explanation / Answer

for first order reactions:-

half life = ln2/rate constant = ln2/(9*10-3) = 77.02 sec

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