# Problem: What are the units for k, the rate constant, in a first order reaction where the time unit is seconds (s)? A. mol/(L•s)B. mol/LC. 1/sD. s•mol/LE. s•L/mol

###### FREE Expert Solution

To determine the unit of k, we will use the following equation:

$\overline{){\mathbf{k}}{\mathbf{=}}{{\mathbf{M}}}^{\mathbf{-}\mathbf{n}\mathbf{+}\mathbf{1}}{\mathbf{·}}{{\mathbf{t}}}^{\mathbf{-}\mathbf{1}}}$

n = overall order of the reaction
n = order with respect to A

t = seconds, s

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###### Problem Details

What are the units for k, the rate constant, in a first order reaction where the time unit is seconds (s)?

A. mol/(L•s)

B. mol/L

C. 1/s

D. s•mol/L

E. s•L/mol