A town located downstream from a chemical
plant was concerned about fluoride ions from the
pl...
A town located downstream from a chemical
plant was concerned about fluoride ions from the
plant leaking into its drinking water. According to
the Environmental Protection Agency, the fluoride
ion concentration in drinking water cannot exceed
4 ppm. The town hired a chemist to analyze its
water. The chemist determined that a 175-gram
sample of the town's water contains 0.000250
gram of fluoride ions.
How many parts per million of fluoride ions are
present in the analyzed sample?
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