Question #af8d7

1 Answer
May 11, 2017

163.

Explanation:

The formula for tribromooctaoxide:
Br3O8
Oxygen has an oxidation state of 2 when it is present in most compounds. ([https://en.wikipedia.org/wiki/Oxidation_state](https://en.wikipedia.org/wiki/Oxidation_state))
Since the sum of oxidation state number of neutral compound is 0, sum of the oxidation number of bromine should equal to the opposite of oxygen's.
(2)83=163