S+O2-S+Na-S+Al-S+Cl2-KOH-H3PO4-Fe2O3-P-

Question

S+O2-
S+Na-
S+Al-
S+Cl2-

KOH-
H3PO4-
Fe2O3-
P-

Answer 1

1. 2S+3O2=2SO3
2. S+2Na=Na2S
3. 3S+2Al=Al2S3
4. S+Cl=не идет