This is not a balanced chemical equation. The correct balanced equation for the reaction between SnS and O2 to produce C2H2 and O2 is:
4 SnS + 9 O2 -> 2 C2H2 + 4 SnO2 + 9 SO2
This is not a balanced chemical equation. The correct balanced equation for the reaction between SnS and O2 to produce C2H2 and O2 is:
4 SnS + 9 O2 -> 2 C2H2 + 4 SnO2 + 9 SO2