josesahagun2667 josesahagun2667

24-05-2018
Biology

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Which halogen is a fatal poisonous gas, but is put in drinking water and swimming pools to prevent serious diseases?

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4mernewyorker 4mernewyorker

24-05-2018

Chlorine is a fatal poisonous gas but is put in drinking water and swimming pools to prevent serious diseases.

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