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Автор - ttt625

помогите пожалуйста​

Ответ

Автор - elmina2802

1)Mg(NO3) 2+Na2CO3=MgCO3+2NaNO3

MgCO3 +H2SO4=H2O+CO2+MgSO4

3)2NaOH+H2SO4=Na2SO4+2H2O

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