Secondary revision · Chemistry - G11

The Mole

Question 1 of 10 Grade: Eleven - G11

How many moles are in 20g of calcium? (Ca=40)

Mass of O in 1 mole of CaCO3 = 48g. Mr of CaCO3 = 100g. Percentage of O = (48/100) × 100 = 48%.

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