2 H2 + O2 = 2 H201) n H2 = m H2 : M H2 = 8 : 2 = 4 (моль)2) n H2 : n H2O = 1:1 => n H2O = 4 (моль)3) m H2O = n H2O * M H2O = 4 * (1+1+16) = 4 * 18 = 72 гОтвет: n H2O = 4 моль; m H2O = 72 г.
ZnO,SnO
ZnO+2HCl=ZnCL2+H2
SnO+SO2=SnSO3
CO2+3H2->CH3OH+H2O
Ответ:
1.KCl+Na=K+NaCl
2.2H2O+2K=H2+2KOH
3.KHCO3+KOH=H2O+K2CO3
4.H2O+K2CO3=KHCO3+KOH
5.KHCO3+KOH=H2O+K2CO3