Homework Answers
fluoride supplement or in the drinking water is a useful adjunct to tooth brushing untill the age of 6 years as it can cause fluorosis and may result in severe dental caries.
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Fluoride as a supplement or in the drinking water is a useful adjunct to tooth brushing...
To aid in the prevention of tooth decay, it is recommended that drinking water contain 0.800...
To aid in the prevention of tooth decay, it is recommended that drinking water contain 0.800 ppm fluoride (F
To aid in the prevention of tooth decay, it is recommended that drinking water contain 0.900...
To aid in the prevention of tooth decay, it is recommended that drinking water contain 0.900 ppm fluoride (F–). (a) How many grams of F– must be added to a cylindrical water reservoir having a diameter of 6.44 × 102 m and a depth of 47.26 m? (b) How many grams of sodium fluoride, NaF, contain this much fluoride?
To aid in the prevention of tooth decay, it is recommended that drinking water contain 0.700...
To aid in the prevention of tooth decay, it is recommended that drinking water contain 0.700 ppm fluoride, F. How many grams of F must be added to a cylindrical water reservoir having a diameter of 1.43 x 102 m and a depth of 88.52 а m?
Project: Fluoride in our Drinking Water 1. What are the standards for fluoride in tap water,...
Project: Fluoride in our Drinking Water 1. What are the standards for fluoride in tap water, fountain water, and DI water? 2. Is this technique (ion-selective electrodes to quantify fluoride) a good one for a quantitative analysis of fluoride in water? Explain your reasoning. 3. Can you think of other methods that might work to analyze fluoride content in water?
39. Tooth enamel is hardened by_which is often added to drinking water. a. iron b. chloride...
39. Tooth enamel is hardened by_which is often added to drinking water. a. iron b. chloride c. chromium d. fluoride 40. Keratin, a protein found in hair and nails, contains the mineral a. iodine b. copper c. sulfur d. zinc 41. The most bioavailable (best absorbed) form of dietary iron, also called heme iron, is found in a. grains b. meat C. milk d. eggs
9) A drinking water plant adds 500 grams of fluoride to a water tank containing 500,000...
9) A drinking water plant adds 500 grams of fluoride to a water tank containing 500,000 liters of drinking water. What is the concentration of fluoride in the water in parts-per-million (ppm)? 10) A bottle of rubbing alcohol contains 75% by mass 2-propanol (C:HsO) in water. What are the mole fractions of 2-propanol and water in the solutions?
Dentists frequently use a 2% sodium fluoride solution in water to prevent tooth decay. Illustrate the...
Dentists frequently use a 2% sodium fluoride solution in water to prevent tooth decay. Illustrate the manner by which a unit of sodium fluoride forms from atoms of the elements sodium and fluorine?
Parts per million (ppm) strengths 31 If drinking water contains 0.7 ppm of fluoride, how much...
Parts per million (ppm) strengths 31 If drinking water contains 0.7 ppm of fluoride, how much fluoride (in milligrams) would be present in 1 litre of water?
A liquid feeder applies a 4% saturated sodium fluoride solution to drinking water. This liquid feeder...
A liquid feeder applies a 4% saturated sodium fluoride solution to drinking water. This liquid feeder increases the fluoride concentration from the natural background level of 0.4 mg F/liter to 1 mg F/liter. The commercial sodium fluoride powder contains 45% F by weight. Determine: 1. The pounds of NaF required per million gallons of water treated. 2. The dosage of 4% NaF solution per million gallons.
A mom is concerned about fluoridation in drinking water. She has read that the maximum contaminant...
A mom is concerned about fluoridation in drinking water. She has read that the maximum contaminant concentration level goal for fluoride in drinking water is 4 ppm. The mom has discovered that her drinking water supply contains 0.8 ppm of sodium fluoride. How many milligrams of sodium fluoride are contained in one liter of drinking water containing 0.8 ppm of sodium fluoride? What is the ratio strength concentration of sodium fluoride in drinking water that contains 0.8 ppm 1I. of...
To aid in the prevention of tooth decay, it is recommended that drinking water contain 0.700 ppm fluoride, F. How many grams of F must be added to a cylindrical water reservoir having a diameter of 1.43 x 102 m and a depth of 88.52 а m?
39. Tooth enamel is hardened by_which is often added to drinking water. a. iron b. chloride c. chromium d. fluoride 40. Keratin, a protein found in hair and nails, contains the mineral a. iodine b. copper c. sulfur d. zinc 41. The most bioavailable (best absorbed) form of dietary iron, also called heme iron, is found in a. grains b. meat C. milk d. eggs
Parts per million (ppm) strengths 31 If drinking water contains 0.7 ppm of fluoride, how much fluoride (in milligrams) would be present in 1 litre of water?
A mom is concerned about fluoridation in drinking water. She has read that the maximum contaminant concentration level goal for fluoride in drinking water is 4 ppm. The mom has discovered that her drinking water supply contains 0.8 ppm of sodium fluoride. How many milligrams of sodium fluoride are contained in one liter of drinking water containing 0.8 ppm of sodium fluoride? What is the ratio strength concentration of sodium fluoride in drinking water that contains 0.8 ppm 1I. of...
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