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Percentage Composition

A mixture con...

Question

A mixture contains $2.5$ g $C a C O_{3}$ and $3.0$ g $N a C l$ . What is the percent by mass of $C a C O_{3} ?$

45.45

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Solution

The correct option is A $45.45$
Total mass $= 2.5 + 3.0 g = 5.5 g$

$%$ by mass $C a C O_{3} = \frac{2.5}{5.5} \times 100 = 45.45 %$

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