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# 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

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## 1 Answer

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$15\times 10^{-5}$%
Hence (A) is the correct answer
answered Jun 16, 2014

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1 answer

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