Внимание! Требуется помощь! В решении ОВР и ионных уравнений.

[tex]Mn + HNO_{3} --> Mn(NO _{3})_{2} + N_{2}O + H_{2}O [/tex] (ОВР)

[tex]Fe + H _{2}SO _{4} --> Fe(SO_{4})_{3} + SO_{2} + H_{2}O [/tex] (ОВР)

[tex]Na_{2}CO_{3} + Ca(OH)_{2} --> 2NaOH + CaCO_{3} [/tex] (ИОННОЕ)
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