If a solution contains 60 g of common salt in 340 g of water, the mass by mass percentage will be:

20%

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15%

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17.6%

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25%

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Solution

The correct option is (A) 15%
Mass by mass percentage of a solution = $\frac{M a s s o f s o l u t e}{M a s s o f s o l u t i o n} \times 100$

Mass of solvent $= 340 g$

Mass of solute $= 60 g$

Mass of solution $= 60 + 340 = 400 g$

Mass by mass percentage of a solution = $\frac{60}{400} \times 100$ = 15%

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