A+2B------3C is found to be first order with respect to B. The reaction is run with an initial concentration of B equal to 2.90*10^{-1} M2.90∗10−1M, the concentration of B is measured again 20 seconds later and found to be 5.64 * 10^{-3} M.5.64∗10−3M. What is the rate constant for this reaction?

Q: what is the rate constant?

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