APFIVE Decomposition of a Carbonate Mixture
A 2.50 g mixture of CaCO₃ and MgCO₃ is heated to complete decomposition, producing a total of 1.15 g of CO₂. What is the mass percent of CaCO₃ in the original mixture?
A
64.8%
B
75.2%
C
35.2%
D
57.0%
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