How am I supposed to know >:(
Explanation:
On dissolution of chromium(II) sulfate is water 2 ions of chromium(III) ion and and 3 sulfate ions are formed.
The balanced chemical equations of the dissolution of chromium (II) sulfate:

On dissolution of gold(III)nitrate is water 1 ions of gold(III) ions and and 3 ions of nitrate ions are formed.
The balanced chemical equations of the dissolution of gold(III) nitrate:

360 miles ; 60 mph steady, meaning 60 miles in one hour, so in 6 hours he will travel 60•6= the miles he traveled total, which equals 360