Study the flow chart given and give balanced equations to represent the reactions A, B and C :

Explanation

The flow chart can be completed as follows
`Mg_(3)N_(2) overset(H_(2)O(A))to NH_(3) underset(Ca(OH)_(2)(C))overset(HCl(B))hArr NH_(4)Cl`
The full reaction are as follows
`Mg_(3)N_(2)+underset("(A)")(6H_(2)O) to 3Mg(OH)_(2)+2NH_(3)`
`NH_(3)+ underset("(B)")(HCl) to NH_(4)Cl`
`2NH_(4)Cl +Ca(OH)_(2) to 2NH_(3)+2H_(2)O+CaCl_(2)`