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OpenStudy (anonymous):
Limestone is a binary mixture of calcium and magnesium carbonates, CaCO3 and MgCO3. At 500 ‘C, MgCO3 thermally decomposes according to the reaction shown in Equation 17, while CaCO3 remains unchanged. MgCO3(s) → MgO(s) + CO2(g) When heated at 500 ‘C, a 2.000g-g sample of limestone from a local quarry loses 0.273g. Calculate the mass percent of MgCO3 present in the limestone.
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