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 ≠