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500.0 mL of 0.120 M NaOH is added to 575 mL of 0.200 M weak acid (Ka = 3.84 × 10-5). What is the pH of the resulting buffer? HA(aq) + OH^-(aq) ---> H20(l) + A^- (aq) pH=
Calculate the change in Gibbs free energy for each of the following sets of ΔH ° rxn , ΔS ° rxn , and T .
Describe the mechanism of the preparation of 2-methyl-3-hexanol by reducing an appropriate carbonyl compound.
Consider the electron shell with principle quantum number n = 5. a.) How many subshells are there with n = 5?
During a recrystallization a student takes 1g of a white (colorless) solid and adds 5 mL of acetone. He heats the mixture in a boiling water bath and adds another
a .50 g sample of vegetable oil is placed in a calorimeter when the sample is burned 18.9kJ are given off what is the caloric value of the oil.
Calculate the average cost of antacid tablet that would be needed to neutralize 1.00 mole of HCl. (Cost Effectiveness) 3. The HCl concentration in a hyperacidic stomach is 0.03M. The volume of liquid in the stomach is 300mL
The molar mass of an oxygenated hydrocarbon substance is 88.0 g / mole.Its composition is as follows:O:36.4%,H :9.0%,C:54.6%. Calculate the empirical formula and molecular formula.(use atomic mass C=12.0,H=1.0,O=16.0)
explain the trends in melting points in going from the chloride to the flouride, making direct reference to the attractive forces that must be overcome to melt the solid and why their strength varies.
What statement below best describes the graph representing the integrated 1st order rate law. plot of ln[a] vs t having a straight line negative slope equal to -k
If you dilute 33.4 mL of a 3.5 M solution to make 244.0 mL of solution, what is the molarity of the dilute solution.
Use the information given to determine the ?Hof of NO(g) in the reaction below. 4NH3(g) + 5O2(g) ? 4NO(g) + 6H2O(g) ?Horxn = -902.0 kJ (NH3(g) ?Hof = -45.9 kJ/mol; H2O(g) ?Hof = -241.8 kJ/mol)
0.12g of compound "Y" dissolves in 10ml of acetone @ 25 deg C and 0.85g of the same compound dissolves in 10 ml of boiling acetone. If 5g of compound "Y" were to be recrystallized from 75 ml acetone, what will be the next maximum amount of "Y" tha..
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