Express in percentage the fluoride concentration in drinking water given in 0.6 ppm.
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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...
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?
How would you express the concentration level of drinking water 0.002 mg/L in ppm and ppb?
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?
1) How many grams of hydrocortisone should be used in preparing 105 suppositories, each weighing 2 g and containing 1% of hydrocortisone? (use one decimal place) 2) Express the following concentration as a ratio strength. Your answer will be 1:X. Determine the value for Xand enter ONLY the value of X in the answer box. 16 mg of active ingredient in 16 mL of solution 3) How many grams of sodium fluoride should be added to 145000 liters of drinking...
What is the concentration (in units of ppm) of sodium fluoride in tap water that has been fluoridated by the addition of 11.7 mg of NaF for every 20.0 kg of solution?
Express the concentration of a 0.0550 M0.0550 M aqueous solution of fluoride, F−,F−, in mass percentage and in parts per million (ppm). Assume the density of the solution is 1.00 g/mL. mass percentage: ppm:
1. Chloroform (CHCl3) has a Drinking Water standard concentration of 0.10 mg/L . a. What is this concentration expressed as parts per million (ppm)? b. Typical consumption Risk Analysis assumes the average human drinks 2.2 L/day for 70 years. How many grams of CHCl3 would the average human consume during a lifetime at the Drinking Water standard concentration? 2. The Air Quality Standard for sulfur dioxide (SO2) is 0.04 ppm. Express this as mg/m3 at 1 atm and 25oC.
Express the concentration of a 0.0880 M aqueous solution of fluoride, F, in mass percentage and in parts per million. Assume the density of the solution is 1.00 g/mL. Number Number 0 0 ppm
Given the average concentration of calcium ion in natural water is 3.8×10^-4 M, and that the solubility product Ksp for CaF2 is 4×10^-11, calculate the maximum molar concentration of fluoride ion. Find the concentration fluoride in ppm scale as well.