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To aid in the prevention of tooth decay, it is recommended that drinking water contain 1.00 ppm fluoride (F-).
(a) How many grams of F- must be added to a cylindrical water reservoir having a diameter of 8.88 × 102 m and a depth of 78.88 m? (b) How many grams of sodium fluoride, NaF, contain this much fluoride?
In a titration of HNO3, you add a few drops of phenolphthalein indicator to 50.00 mL of acid in a flask. You quickly add 26.50 mL of 0.0502 M NaOH but overshoot the end point, and the solution turns deep pink.
The selenite ion is an oxoanion of selenium bearing a negative two charge and containing three oxygen atoms. Write the formula for the selenite ion.
The yield of the reaction to form your chalcone is not quantitative. What side products might be formed from your aldol condensation?
Calculate the density of N2 at STP, (a) using the ideal-gas law and (b) using the molar volume and molar mass of N2.
The amount of aspiring (molar mass of 180.15 g/mole) in a commercial tabletwas determined by titration with NaOH. What mass of aspiring was in a tablet if 15.00 mL
The flask was then shaken until the solution was uniform. A 25.0-sample of this glucose solution was diluted to 0.500 . How many grams of glucose are in 100. of the final solution?
You are fortunate to land a research position with Dr. Xavier Wray. Your first day in the lab the good doctor asks you to make a liter of 0.1 M citrate buffer pH 3.5 that you will need for the big extract procedure he will show you how to do after..
how many moles of hydrogen ions were converted to water when 85. ml of 1.0 M hydrochloric acid were neutralized by sodium hydroxide.
What is the percentage protonation of the solute and Calculate the pH of the solute in an aqueous solution of 0.611 M Aqueous solution of Ammonia
Ice cream mix containing 40% total solids is frozen so that half of the original water is made into ice (which is effectively pure water). If the mix contained 12% fat, 16% sugar, and 12% nonfat milk solids
What is the pH of a solution resulting from the addition of 11.9 mL of 0.20 M HCl to 50.0 mL of 0.12 M NH3? Assume the volumes are additive. Kb of NH3 = 1.8 10-5.
If a bottle of nail polish remover contains 177 ml of acetone, how much heat would be released by its complete combustion? The density of acetone is .788 g/ml
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