Question

H₂ + O₂
Be + Cl₂
Cu + O₂ →
Al + O₂ →
Al + Cl₂
Na + Cl₂ →​

Answer 1

Н₂ + О₂ → 2Н₂О

Ве + Сl₂ → BeCl₂

2Cu + O₂ → 2CuO

4Al + 3O₂ → 2Al₂O₃

2Al + 3Cl₂ → 2AlCl₃

2Na + Cl₂ → 2NaCl