Fluoridation is the process of adding fluorine compounds to drinking water to fight tooth decay. a concentration of 1 ppm of fluorine is sufficient for the purpose (1 ppm means one part per million, or 1 g of fluorine per 1 million g of water). the compound normally chosen for fluoridation is sodium fluoride, which is also added to some toothpastes. calculate the quantity of sodium fluoride in kilograms needed per year for a city of 50,000 people if the daily consumption of water per person is 150 gal. what percent of the sodium fluoride is "wasted" if each person uses only 6.0 l of water a day for drinking and cooking (sodium fluoride is 45.0 percent fluorine by mass; 1 gal= 3.79 l; 1 year =365 days; 1 ton =2000 lb; 1 lb =453.6g; density of water =1.0 g/ml)?
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Chemistry, 22.06.2019 05:30
Why is soap used to remove grease? a. its nonpolar end dissolves the grease. b. it makes the water bond with the grease. c. it chemically bonds with the grease. d. its polar end dissolves the grease.correct answer for apex - a, its nonpolar end dissolves the grease.
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Fluoridation is the process of adding fluorine compounds to drinking water to fight tooth decay. a...
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