Question

Question #af8d7

Answer 1

`16/3`.

Explanation:

The formula for tribromooctaoxide:
`Br_(3)O_(8)`
Oxygen has an oxidation state of `−2` when it is present in most compounds. (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)*8/3=16/3`