M(CuO)=n•M=2•80=160г
m(H2SO4)=n•M=0.5•98=49г
3C2H2+8KMnO4=3K2C2O4+8MnO2+2KOH+2H2O
AL4C3 +12H2O ---->3CH4 + 4Al(OH)3
X1
2CH4 ---->C2H2 +3H2
X2
3C2H2 ---->C6H6
X3
C6H6 + Br2 ---->C6H5Br + HBr
X4
3Cu2S + 22HNO3 = 6Cu(NO3)2 + 10NO + 3H2SO4 + 8H2O
2Cu(+1)-2e=2Cu(+2)|3
N(+5)+3e=N(+2) | 10
S(-2)-8e=S(+6) |3