Question

Consider the following reactions

The number of protons that do not involve in hydrogen bonding in the product B is______.

Answer 1

$3\text{NiS} + 2\text{HNO}_3 + 6\text{HCl} \rightarrow 3\text{NiCl}_2 + 2\text{NO} + 3\text{S} + 4\text{H}_2\text{O}$