0.25 g of a substance is dissolved in 6.25 g of a solvent. Calculate the percentage amount (by mass) of the substance in the solution.

3.85%

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6.85%

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48.5%

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91.2%

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Solution

The correct option is A 3.85%
Mass of solute = 0.25 g
Mass of solvent = 6.25 g
Mass of solution = 0.25 + 6.25 = 6.50 g
Percentage amount of the solute $= \frac{0.25}{6.50} \times 100 = 3.85 %$

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