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Q 1866867775.     A sample of drinking water was found to be
severely contaminated with chloroform `(CHCl_3)`,
supposed to be a carcinogen. The level of
contamination was 15 ppm (by mass).
(i) express this in percent by mass.
(ii) determine the molality of chloroform in the
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)