Допишіть рівняння реакцій, розставте коефіцієнти:

a) Al + H_{2}*S*O_{4} =

6) MgO + H_{2}*S*O_{4} =

в) Ba^ CO 2 + H_{3}*P*O_{4} =

г) K_{2}*C*O_{3} + HN*O_{3} =​
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