Sample of drinking water was found to be severely contaminated with chloroform. `CHCl_3`. Supposed to be carcinogenic in nature. The level of contamination was 15 ppm (by mass). Express this in percent by mass.

A sample of drinking water was found to be severely contaminated with chloroform (CHCl_3) supposed to be a carcinogen. The leve of contamination was 15 ppm (by mass): express this in percent by mass.

A sample of drinking water was found to be severely contaminated with chloroform (CHCl_3) supposed to be carinogen.The level of contamination was 15 ppm (by mass) Determine the molality of chloroform in the water sample.