Chalk contains $10 %$ Calcium, $3 %$ Carbon and $12 %$ Oxygen. Find the amount (in grams) of each of these compounds in $1$ kg of chalk.

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Solution

Total weight of chalk $= 1 k g = 1000 g$

Quantity of Calcium $= 1000 \times \frac{10}{100} = 100 g$

Quantity of Carbon $= 1000 \times \frac{3}{100} = 30 g$

Quantity of Oxygen $= 1000 \times \frac{12}{100} = 120 g$

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