What is the concentration of sugar $\left({\mathrm{C}}_{12}{\mathrm{H}}_{22}{\mathrm{O}}_{11}\right)$ in $\mathrm{mol} {\mathrm{L}}^{-1}$ if its $20 \mathrm{g}$ are dissolved in enough water to make a final volume up to $2 \mathrm{L}$?
($0.03/0.3$)

(Provide correct answer upto two decimal places and no need to mention units).

A sample of drinking water was found to be severely contaminated with chloroform, ${\mathrm{CHCl}}_3$, supposed to be carcinogenic in nature. The level of contamination was $15 \mathrm{ppm}$ (by mass).

Express this in percent by mass.

A sample of drinking water was found to be severely contaminated with chloroform, ${\mathrm{CHCl}}_3$, supposed to be carcinogenic in nature. The level of contamination was $15 \mathrm{ppm}$ (by mass).

Determine the molality of chloroform in the water sample. [Given Mass percent is $1.5\times {10}^{-3}$]