# How much (in grams) of a 4.2 g sample of strontium carbonate is due to the strontium?

How much (in grams) of a 4.2 g sample of strontium carbonate is due to the strontium?

Consider the following:

the formula of strontium carbonate is SrCO3

there is 1 mol strontium ion in 1 mol strontium carbonate: LaTeX: 1mol\:Sr^{2+}=1mol\:SrCO_3

### 1 Answer

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- 1 month ago
Molar mass of SrCO3 is 147.6289 g/mol

atomic mass of Sr = 87.62g/mol

% Sr in the carbonate = 59.3515 %

mass of Sr in 4.2 g of carbonate 59.3515 % of 4.2g = 2.5 g ( 2 significant figures)

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