На месте знаков “?” правильно заполните пропуски в уравнениях химических реакций: Ca + 2HCl = Ca”?” + H2 ↑ 2Mg + “?” = 2MgO 2H2”?” + 3O2 = 2H2O + 2SO2 Fe2O3 + 3H2 = 2Fe + 3”?”O CaCl2 + 2NaOH = Ca(OH)2 + 2Na”?”
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Answers & Comments
Ca + 2HCl = CaCl2+H2
2Mg+O2=2MgO
2H2S+3O2=2H2O+2SO2
Fe2O3+3H2=2Fe+3H2O
CaCl2+2NaOH=Ca(OH)2+2NaCl