Calcium carbonate () is 34.5% Ca by mass. In a 418 g sample of, how many grams of calcium are present?

Question

Chemistry

Rhianna

2 January, 15:20

Calcium carbonate () is 34.5% Ca by mass. In a 418 g sample of, how many grams of calcium are present?

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Answers (1)

Know the Answer?

Eliezer Webb · Answer 1

144.2 g of Ca are present in 418 g of sample

Explanation:

34.5 % Ca → In 100 g of salt there are 34.5 g of Ca

Let's make a rule of three:

In 100 g of salt there are 34.5 g of Ca

In 418 g of salt there must be (418. 34.5) / 100 = 144.2 g