Combative Activities
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From the graph, mass of CO₂ lost in 1 minute is 2.2g. Moles of CO₂ = 2.2/44 = 0.05 mol. CaCO₃ + 2HCl → CaCl₂ + CO₂ + H₂O. Moles of CaCO₃ = 0.05 mol. Mass = 0.05 × 100 = 5.0g.
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