S + O2 = SO2
32г 64 г
100г х г
х = 100*64/32 = 200 г
))))))))
4Na+O2=2Na2O
Na2O+H2O=2NaOH
2NaOH+H2SO4=Na2SO4+2H2O
CH3-CH2-CH3 →CH3-CH≠CH2
CH3-CH≠CH2 + Br2→CH3-CHBr-CH3
CH3-CH2-CH3 +СI2 → CH3-CHCI-CH3+HCI
CH3-CHCI-CH3 →CH3-CH≠CH2
CH3-CH≠CH2 +CI2 →CH3-CHCI-CH2CI