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It is recommended that drinking wtaer contain 1.6 ppm fluoride (F-) for prevention of tooth decay. Consider a reservoir with a diameter of 4.50x10^2m and a depth of 10.0m. (The volume is pi x r^2 x h, where r is the radius and h is the height.) How many grams of F- should be added to give 1.6 ppm? Fluoride is provided by hydrogen hexafluosilicate, H_2SiF_6. How many grams of H_2SiF_6 contain this much F-?
the product for the following reaction between THF and excess HI, and provided a detailed step-bystep mechanism for its formation, using the curved arrow formalism
Which of the acids in question #3 would be the best choice to create a buffer with pH = 7.35? If you had 250.0 mL of a 0.20 M solution of the acid, what mass of the corresponding sodium salt of the conjugate base would be required to make the buff..
Calculate the average speed of an oxygen gas molecule, O2, at 19.0 degrees Celsius.
Which of the following pairs has about the same atomic radius?
How many moles contain each of the following?
Compare and contrast the major products of dehydrohalogenation of 2-chloro-4-methylpentane with (a) sodium ethoxide in ethanol and (b) potassium tert-butoxide in 2-methyl-2-propanol (tert-butyl alcohol).
Calculate the molar concentration of uncomplexed Zn2+ in a solution that contains 0.20 mole of Zn(NH3)42+ per liter and 0.0116 M NH3 at equilibrium.
Identify the type of interactions involved in each of the following processes taking place during the dissolution of sodium chloride (NaCl) in water.
In a beaker, I mix 50 ml of 3 M HCl with 100 ml distilled water. Both fluids are at 25 C initially. (Cp mix =. 0.985 cal/g-C) a. what is the final T.
For which of the following would nitration (via Electrophilic aromatic substitution) occur in the ortho- and para- position?
These two substances reach thermal equilibrium at a temperature of 64.2 degree celsius. If the specific heat capacity of substance "B" is 1.17 J / g-C, what is the specific heat of substance "A". (assume no heat is lost to the surroundings)
Calculate the cell potential E for a silver-silver chlroide lectrode immersed in 0.800 M KCl at 25 C.
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