4P+5O2+2P2O5
P2O5+3H2O=2H3PO4
2H3PO4+3Ba(OH)2=Ba3(PO4)2+6H2O
1) СаС2+2Н2О-Са(ОН)2+СНСН
2)С2Н2+Н2О-(HgSO4)-CH3COH
3)CH3COH+KMnO4+H2SO4-CH3COOH+K2SO4+MnSO4+H2O
4)CH3COOH+C3H7OH-(t; H2SO4)-CH3COOC3H7+H2O
5)CH3COOC3H7+H2O-C3H7OH+CH3COOH
6)C3H7OH+K-1/2H2+ C3H7OK
Fe2O3 + 3H2 --> 2Fe + 3H2O
4Al + 3O2 --> 2Al2O3
Zn + 2HCl --> ZnCl2 + H2
Ca3(PO4)2 -->(t) 3CaO + P2O5
H=1
а у него ещё стоит 2
S=32
значит 1*2+32= 34