Explain how much magnesium carbonate was present

Reference no: EM13267898

A 21.0054 g sample of impure magnesium carbonate was heated to complete decomposition according to the equation
MgCO3(s) --> MgO(s) + CO2(g) .

After the reaction was complete, the solid residue (consisting of MgO and the original impurities) had a mass of 19.0732 g. Assuming that only the magnesium carbonate had decomposed, how much magnesium carbonate was present in the original sample?

Reference no: EM13267898

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