[slu1986]

In aqueous solution, hypobromite ion, BrO-, reacts to produce bromate ion, BrO3-, and bromid ion, Br-, according to the following chemical equation:

                      3BrO-  ---> BrO3^- + 2Br-

A plot of 1/[BrO-] vs. time is linear and the slope is equal to 0.056M^-1 s^-1.  If the initial concentration of BrO- is 0.80 M, how long will it take one-half of the BrO- ion to react?

A) 4.5 * 10^-2 s
B) 7.1 s
C) 12 s
D) 22 s

Could someone please guide me in the right direction on how to solve this problem? Thanks

[Yggdrasil]

A plot of 1/[BrO-] vs. time is linear

What does this tell you about the order of the reaction?  Is it first order?  Second order?