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11-02-2020
Chemistry

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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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anfabba15 anfabba15

11-02-2020

Answer:

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

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