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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