Intext Questions Calculate the mass ...

NCERT Class XII Chemistry
Chapter - Solutions
Questions with Solutions

Question : 42 of 53

Marks: +1, -0

Intext Questions

Calculate the mass percentage of benzene

(\mathrm{C_6H_6})

and carbon tetrachloride (

\mathrm{CCl_4}

) if 22 g of benzene is dissolved in 122 g of carbon tetrachloride.

Solution:

Mass of solution = Mass of benzene + Mass of carbon tetrachloride

= 22 g + 122 g = 144 g

\text{Mass percentage of benzene}

= \frac{\text{Mass of benzene}}{\text{Mass of solution}} \times 100

= \frac{22\,\text{g}}{144\,\text{g}} \times 100 = 15.28\%

∴ Mass percentage of

\mathrm{CCl_4}

= 100 – Mass percentage of benzene

= 100 - 15.28 = 84.72\%

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