Question

balancing of equation question number 2 n2 +h 2 is equal to Nh3 question number 3 KCL O3 is equal to KCL plus o2question number 4 Hgois equal to HG plus O2 question number 5 NH3 + cl2 is equal to n 2 + nh4cl

Answer 1

Just make the number of atoms on left hand side and right hand side equal.
You can have problem with question no. 5
So to solve it make collumns of LHS and RHS then make the no. of atoms equivalent.