1)алканы,
например, C2H4+H2->C2H6
BaCl2 + H2SO4 = BaSO4 + 2HCl
Ba(+2) + 2Cl(-) + 2H(+) + SO4(-2) = BaSO4 + 2H(+) + 2Cl(-)
Ba(+2) + SO4(-2) = BaSO4 ( белый осадок)
O2+H2=H2O
H2O+Na=NaON+H2
H2+N2=NH3
NH3+O2=NO2+H2O
H2O+P205=H3PO4
H3PO4+NaOH=Na3PO4+H2O
Na+H2O=NaOH+H2
2Al + 3F2<span> = 2AlF</span><span>3
</span>2Al + 3Cl2<span> = 2AlCl</span><span>3
</span>2Al + 3Br2 = Al2Br6
<span>2Al + 3I2 = 2AlI3 </span>