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for each of the following reactions, all are first order, find the rate constant in respect...

for each of the following reactions, all are first order, find the rate constant in respect to rate of decomposition of [A]

a. A--->B , given the concentration of [A] decrease to half of it's initial rate in 1000sec.

b. A--->B , given the concentration of [A] decreases from 0.67 mol/L to 0.53 mol/L in 25 sec.

c. 2A--->B+C , given the initial concentration of [A]0 =0.153 mol/L and after 115 sec  the concentration of [B] increases to 0.034 mol/L

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