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Consider a buffer solution comprised of HF and F. The Ka of HF is 6.3x10^-4. If the pH of the buffer solution is 3.90 and [HF] = 0.0121 M, how many moles of F are present? The volume of the solution is 100 mL.
How many grams of NaOH are in a 225.0 mL sample of 2.5 M solution of NaOH.? Molar mass of NaOH is 40.0 g/mol
A student titrated a .4630g sample of unknown monoprotic acid with 0.1060m NaOH. Using a derivative curve, the student found, the equivalence point volume to be 28.70mL of NaOH
how many times faster will the reaction occur at 43circ rm c than at 0 circ rm c? how many times faster will the
The solid and toluene together weigh 58.34 g. The density of toluene at the temperature of the experiment is 0.864 g/mL. What is the density of the solid?
how do you find the mass of one mole of spilt pea using the mass of .069 nd Avoadro's number (6.02x1023rd).
Discuss the common-ion effect by comparing the solubility of CaCO3 in 3.0 x 102 ml of water and in the presence of 0.015 mole of Ca(NO3)2.
What new compound will eventually be formed when HCl is added to a solution of pentanal in methanol
A transition mutation for the second codon of glu would result in a gly. Explain the consequences of this, if the glu that was mutated was in the central region of a alpha-helix
Draw structure of the product(s) (show stereochemistry) of bromine addition to fumaric acid assuming that bromine adds to this compound the same way it does to cinnamic acid.
What mass of oxygen is needed to react with 2.21 gal of methanol according balance equation below. (1 gal = 3.79 liters, density of methanol = .793 g/mL. 2CH3OH (l) + 3O2 --> 2CO2 (g) + 4H2O (g)
10 mL of 0.1 M NaOH is added to 50 mL of 0.1 M of the hypothetical acid HA. write the chemical equation and calculate the molarity of NaA and HA in the final solution.
For 220.0 mL of a buffer solution that is 0.205 M HCHO2 and 0.295 M KCHO2, calculate the initial and the final pH after adding 0.010 mol of NaOH.
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