Limestone is mostly calcium carbonate, CaCO3, but it also contains other minerals. When heated, the CaCO3 decomposes into CaO and CO2. A sample of 1.605 g of limestone was heated and gave off 0.657 g of CO2.
a. Formulate the equation for the thermal decomposition of calcium carbonate.
b. Determine the percentage mass of CaCO3 in the limestone.
c. State the assumptions you are making in this calculation.