Chemistry, 18.02.2020 05:36 reginagotredhair
Fluoridation is the process of adding fluorine compounds to drinking water to help 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 115.0 gallons. (Sodium fluoride is 45.0 percent fluorine by mass. 1 gallon = 3.79 L; 1 ton=2000lb; 1 lb= 453.6 g; density of water =1.0 g/mL)
Answers: 1
Chemistry, 22.06.2019 12:20
Which is an example of the practical pursuit of alchemy? a. forming perfect substances. b. transforming base metals. c. developing metalworking techniques. d. linking spiritual characteristics with material substances.
Answers: 1
Chemistry, 22.06.2019 13:30
Why does asexual reproduction result in offspring with identicle genetic variation
Answers: 2
Chemistry, 22.06.2019 13:30
Table sugar completely dissolved in water is an example of a?
Answers: 1
Chemistry, 22.06.2019 16:50
Which of the following is an indication that a substance has undergone a chemical change? a. no new product has been formed. b. the color of the substance has not changed. c. the original constitute has not changed. d. the molecular structure has changed.
Answers: 1
Fluoridation is the process of adding fluorine compounds to drinking water to help fight tooth decay...
Arts, 16.09.2019 07:30
Chemistry, 16.09.2019 07:30
Social Studies, 16.09.2019 07:30
History, 16.09.2019 07:30
Advanced Placement (AP), 16.09.2019 07:30
History, 16.09.2019 07:30
English, 16.09.2019 07:30
Biology, 16.09.2019 07:30
History, 16.09.2019 07:30
Business, 16.09.2019 07:30