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 0.800...
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 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?
Fluoride as a supplement or in the drinking water is a useful adjunct to tooth brushing until the age of years.
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...
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?
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 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?
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?
The department of health and human services recently recommended the concentration of fluoride in drinking water be limited to 0.7mg/L (the current policy allows for a range of 0.7 to 1.2 mg/L). The concentration of fluoride in natural water depends on The presence of fluoride-containing minerals 9. (7 points) The Department of Health and Human Services recenty recommended oe concentration of fluoride in drinking water be limited to 0.7 mg (the current poley wws t a range of 0.7 to...
Tooth enamel consists of hydroxyapatite, Ca5(PO4)3(OH) with a Ksp of 6.8x10-37. In water the has the potential break down using the reaction: Ca5(PO4)3(OH) (s) « 5Ca2+(aq) + 3PO33-(aq) + OH-(aq) Fluoride ions are added to the water to react with the Ca5(PO4)3(OH) and form the m ore tooth decay-resistant fluoride apatite, Ca5(PO4)3F (Ksp=1.0x10-60). Fluorinated water has dramatically decrease cavities in children, (a) calculate the solubility of Ca5(PO4)3(OH) in water and (b) will the Ca5(PO4)3F be more or less soluble?