Answer
1Ca3N2 + 6NaCl ---> 3CaCl2 + 2Na3N
Step-by-step explanation
Given the following equation:
___ Ca3N2 + ___NaCl -->CaCl2+__ + Na3N
Step 1: on the left there are 3 Ca, but on the right, there is one Ca, add 3 infront of CaCl2
Ca3N2 + NaCl ---> 3CaCl2 + Na3N
Step 2: on the right, there are 6 Cl, on the left there is only 1, therefore add 6 infront of NaCl
Ca3N2 + 6NaCl ---> 3CaCl2 + Na3N
Step 3: Now balance N, there are 2 N on the left and one on the right.
Ca3N2 + 6NaCl ---> 3CaCl2 + 2Na3N