100.0 g of a ground mineral sample consisting of a mixture of MgCO₃ (magnesite) and BaCO₃ (witherite) was heated to completely convert the carbonates to their metal oxides. After the reaction 57.35 g of the metal oxide mixture was obtained. What was the mass of MgCO₃ in the original sample?

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Chapter3: Chemical Reactions
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Problem 50PS: The mineral rhodothrosite is manganese() carbonate. Write an overall, balanced equation for the...
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100.0 g of a ground mineral sample consisting of a mixture of MgCO₃ (magnesite) and BaCO₃ (witherite) was heated to completely convert the carbonates to their metal oxides. After the reaction 57.35 g of the metal oxide mixture was obtained. What was the mass of MgCO₃ in the original sample?

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