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colleen colleen
wrote...
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Posts: 17077
11 years ago
 Express these concentrations in parts per million (10,000 ppm =1%).
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wrote...
11 years ago
0.01 % x 10,000 ppm/% = 0.01 x 10,000 = 100 ppm

0.05 % x 10,000 ppm/% = 0.05 x 10,000 = 500 ppm
Biology!
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