Какие из перечисленных уравнений реакций записаны верно:
2Na + 2HCl= 2NaCl+ H2↑
2Na + 6HCl= NaCl+ 3H2↑
2FeCl2 + Cl2 = 2FeCl3
FeCl2 + Cl2 = 4FeCl3
Ca(OH)2 + HNO3 = CaNO3 + 3H2O
Ca(OH)2 + 2HNO3 = Ca(NO3)2 + 2H2O
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