СH4 + Cl2 > CH3Cl + HCl
2CH3Cl + 2Na > 2NaCl + CH3-CH3
CH3-CH3 + Cl2 > CH3-CH2Cl + HCl
2CH3-CH2Cl + 2Na > 2NaCl + CH3-CH2-CH2-CH3
Вроде так
СH4 + Cl2 > CH3Cl + HCl
2CH3Cl + 2Na > 2NaCl + CH3-CH3
CH3-CH3 + Cl2 > CH3-CH2Cl + HCl
2CH3-CH2Cl + 2Na > 2NaCl + CH3-CH2-CH2-CH3
Вроде так