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The fluoridation of city water supplies has been practiced in the United States for several decades. It is done by continuously adding sodium fluoride to water as it comes from reservoir. Assume you live in a medium sized city of 150,000 people and that 660L of water is consumed per person per day. What mass of sodium fluoride, NaF, in kg must be added to the water supply each year (365days) to have the required fluoride concentration of 1ppm (part per million) that is, 1 kg of fluoride per 1 million kg of water? Sodium fluoride is 45% fluoride by mass (45kg F/100 kg NaF), and water has a density of 1.00g/cm3. The answer is supposedly 80,300 kg please show me how they got this?
You have 170. mL chlorine trifluoride gas at 669 mmHg and 45°C. What is the mass (in g) of the sample?
Calculate the diffusion limiting current for the oxidation of an organic compound at an electrode in stagnant solution. Assume 6 electrons are involved in the reaction (n=6). C(org) = 0.01 M, D(org) = 2x10^-5 cm^2/s.
Determine How many moles each are in 1.30L of the saline solution if a physiological saline solution contains 174mEq/L each of Na+ and Cl - .
Methyl alcohol (CH3OH) is made by reacting carbon monoxide with H2. Starting with 2.5 g of H2 and 30 L of CO, what mass of methyl alcohol could be produced at STP? which is the limiting reactant?
Compute the amount of heat required to boil 92.1 grams of benzene (C6H6), start from a temperature of 42.5 degrees Celsius.
If 7.50 g of the unknown compound contained 0.250 mol of C and 0.500 mol of H, how many moles of oxygen,O, were in the sample?
What velocity would an electron 9.11*10^-31 kg need for its de Broglie wavelength to be that of red light 745nm ?
At a certain temperature and pressure 2.8 L of N2 reacts with 4.2 L of O2. If all the N2 and O2 are consumed, what volume of N2O3, at the same temperature and pressure, will be produced
The densities of ice and water at 0 C are 0.9168 and 0.9998 respectively. if delta h for the fusion process at atmospheric pressure is 0.625 what is delta u.
A solution of ethanol (C2H5OH) in water is prepared by dissolving 65.8 mL of ethanol (density = 0.79 g/cm3) in enough water to make 250.0 mL of solution.
assume that the pressure in the bottle was 1.5 atm, the bottle had a headspace of 20 mL, and the headspace contained 90% CO2. carbonate species and dissociation products of water.
A benzylic carbocation is generated under the conditions of part A. would the presence of a para CH3O- group on the benzene ring
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