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  3. Chemistry
  4. A solution is prepared by adding 5 g of a solute 'X' to 45 g of solvent 'Y'. What is the mass per cent of the solute 'X'?

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Q. A solution is prepared by adding $5 \,g$ of a solute $'X'$ to $45\, g$ of solvent $'Y'$. What is the mass per cent of the solute $'X'$?

Some Basic Concepts of Chemistry

Solution:

Mass percent of $X = \frac{\text{Mass of $X$}}{\text{Mass of solution}} \times 100$
$ = \frac {5}{5+45} \times 100 = 10 \%$