Chemistry , please !

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when 21g of magnesium carbonate was heated , magnesium oxide produced . carbon dioxide also released. what is the volume of carbon dioxide released ?

  • Chemistry , please ! -

    MgCO3 + heat ==> MgO + CO2
    mols MgCO3 = grams/molar mass.

    Convert mols MgCO3 to mols CO2 (use the coefficients in the equation).
    Then mols x 22.4 L/mol = L CO2.

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