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Consider the following chemical reaction of the decomposition of calcium carbonate:
CaCO₃(s) → CaO(s) + CO₂(g)
If a 40 g sample of calcium carbonate (CaCO₃) completely decomposes to form 22,4 g of CaO.
Using the law of constant composition, calculate the mass of carbon dioxide (CO₂ formed after the complete decomposition of a different 30 g sample of calcium carbonate (CaCO₃).