Расставьте коэффициенты в следующих схемах реакций:Al + O2 = Al2O3N2 + H2 = NH3Ca + H3PO4 = Ca3(PO4)2 +H2Ba(OH)2 + HCl = BaCl2 + H2OZnCl2 + AgNO3 = AgCl + Zn(NO3)2
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N2 + 3H2 = 2NH3
3Ca + 2H3PO4 = Ca3(PO4)2 +3H2
Ba(OH)2 + 2HCl = BaCl2 + 2H2O
ZnCl2 + 2AgNO3 = 2AgCl + Zn(NO3)2