I have a few questions regarding kinetics. I posted them below. Thank you!

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Question description

 Hello! I have a couple of homework problems that I can't seem to get right. I will paste them here.

For the first-order rate of reaction A --> B + C, what is the concentration of A (in M) after 52.0 s if [A]o = 0.20 M and k = 0.030 s-1?

For a first-order reaction, the initial reactant concentration is 0.722 M. After 48.5 min, the concentration is 0.501 M. What is k in min-1?

For a first order reaction, the initial reactant concentration, [A]o, is 0.94 M. After 10.0 s, the concentration is 0.67 M. What is [A] after 84 s?

For a second-order reaction, the initial reactant concentration is 0.66 M. After 14.5 min, the concentration is 0.27 M. What is k in M-1min-1?

For a second order reaction, the initial reactant concentration, [A]o, is 0.90 M. After 17.9 s, the concentration is 0.69 M. What is [A] after 55 s? 

For the reaction A → B + C, when the natural log of [A] is plotted versus the time in seconds a straight line is obtained whose slope is -0.033 s-1. What is the concentration of A (in M) after 58.0 s if [A]o = 0.60 M?

Thank you ! 

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