Yes, very informational. thank you.
10000 gallons= 37.85 cubic feet
The symbols indicate the physical state of each reactant
Explanation:
The given reaction equation is as follows.
+ ___ 
As there is release of one hydrogen which shows that mass number has increase by 1 on the product side.
Therefore, particle
must be added in order to balance the given reaction equation.
Hence, the complete reaction equation will be as follows.

Electron number
(:,,,,,,,,,,,,,,,,,,,,