Verified answer

1)

2Al + 6H₂O = 2Al(OH)₃ + 3H₂

2Al + 2NaOH + 6H₂O = 2Na[Al(OH)₄] + 3H₂

2Al + 2NaOH + 2H₂O = 2AlNaO₂ + 3H₂

ответ: Al(OH)₃, Na[Al(OH)₄] , AlNaO₂ --- 1,2,3

2)

2Al + Cr₂O₃ = 2Cr + Al₂O₃

8Al + 3Fe₃O₄ = 9Fe + 4Al₂O₃

ответ: 2.3

3)

2Al + N₂ = 2AlN

4Al + 3C = Al₄C₃

2Al + 3S = Al₂S₃

2Al + 3Cl₂ =  2AlCl₃ (без t)

Al + H₂ ≠