What is the value for the rate constant $($without units$)$ for the given data in the table?

B r O subscript $3$ to the power of minus subscript a q end subscript space plus space $5$ B r to the power of minus subscript a q end subscript space plus space $6$ H to the power of plus subscript a q end subscript space rightwards arrow space $3$ B r subscript $2$ a q end subscript space plus space $3$ H subscript $2$ O subscript l

Initial concentration of reagents $($molarity$)$ and observed rates.

SYSTEM

$[$BrO$3-]$i

$($molarity$)$

$[$Br$-]$i

$($molarity$)$

$[$H$+]$i

$($molarity$)$

Rate

$($M sec$-1)$

$10\mathrm{.}100\mathrm{.}100\mathrm{.}107\mathrm{.}9$ x $10-4$

$20\mathrm{.}200\mathrm{.}100\mathrm{.}101\mathrm{.}7$ x $10-3$

$30\mathrm{.}100\mathrm{.}200\mathrm{.}103\mathrm{.}1$ x $10-3$

$40\mathrm{.}100\mathrm{.}100\mathrm{.}203\mathrm{.}2$ x $10-3$