Терміново!!!!!!! Даю 50.
Доповніть схеми реакцій та доберіть коефіцієнти.
в)....... + HBr = NaBr + .......
е)MgO + ....... = Mg(NO3)2 + .......
є)Al2O3 + ....... = Al2(SO4)3 + .......​
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