Crey | A sample of drinking water was found to be severely contaminated with chloroform, CHCl3, supposed to be carcinogenic in nature. The level of contamination was 15 ppm (by mass). Express this in percent by mass. 2.5 x 10^-3%, 1.5 x 10^-3%, 5.5 x 10^-3%, 8.5 x 10^-3%

Question

A sample of drinking water was found to be severely contaminated with chloroform, CHCl3, supposed to be carcinogenic in nature. The level of contamination was 15 ppm (by mass). Express this in percent by mass.

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