A solution is prepared by dissolving 2g of a substance A to 18g of water. Calculate the mass percent of the solute.

Solution

Mass space percent space equals space fraction numerator Mass space of space solute left parenthesis straight g right parenthesis cross times 100 over denominator Mass space of space solution space left parenthesis straight g right parenthesis end fraction

space Mass space of space solution space equals space 2 straight g space of space straight A space plus 18 straight g space of space water space equals space 20 straight g therefore space space space space Mass space percent space equals space fraction numerator 2 straight g over denominator 20 straight g end fraction cross times 100 space equals space 10 percent sign

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