2CH4=C2H2+3H2
C2H2+C2H2=<span>HC ≡ С - СН = СН2
</span>HC ≡ С - СН = СН2 = H2C = СH - СН = СН2+H2
2C2H5OH= H2C=СH - СН = СН2+2H2O+H2
CH3CHO+H2=C2H5OH
4Р + 5О2 = 2Р2О5
СuO + Cu = Cu2O
1) 2K+2H2O=2KOH=2KOH+H2
2)2Cu+2S= 2CuS
3)Fe+H2SO4=FeSO4+H2<u>(cтрелка вверх)
4)Fe+H2O=FeO+H2
5)Ag+O2=Ag2O
6)Sn+CuCl2=SnCl2+Cu
7)2Al + 6HCl = 2AlCl3 + 3H2
8)Ba+2H2O=Ba(OH)2 + H2↑
9)Cu+FeSo4=CuSO4+Fe
10)Ba+N2=BaN2
11)2Mg+O2=2MgO
12)Cu+H2SO4=CuSO4 + SO2 + H2O </u>
Zn + H2SO4 = ZnSO4 + H2
n(H2SO4) = 0,25 моль = n(H2)
V(H2) = n*Vм = 0,25*22,4 = 5,6 л