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Problem 4 - Entrance Test

The number of moles of CaCO3 required to produce 8.8 g of CO2 at STP is

Correct: A

At STP, 1 mole of CO2 occupies a volume of 22.4 liters and weighs 44 g. The number of moles of CO2 required to produce 8.8 g is (8.8/44) = 0.2