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Consider the titration of 30.0mL of 0.050M NH3 with 0.025 M HCl. Calculate the pH after the following volumes of tirant have been added.
A. 0mL
B. 20mL
C. 59.2mL
D. 60mL
E. 71.8mL
F. 73mL
A certain reaction with an activation energy of 185 kJ/mol was run at 485K and again at 505K. What is the ratio of f at the higher temperature to f at the lower temperature
A hydrogen atom initially in the n=7 quantum state emits a photon having a wavelength of 2.16495E-6 m. What is the quantum number of the final state of the atom?
The calcium in a second 10.00-mL aliquot was isolated as CaC2O4(s) redissolved in acid, and titrated with 12.21 mL of the EDTA solution. Assuming that 15 to 300 mg of magnesium and 50 to 400 mg calcium per day are normal, did this specimen fall wi..
what would be two examples of reductive alkylation of N-methylbenzylamine and formaldehyde
Calculate the pH of an aqueous solution prepared to contain 1.3 x 10^-3 M sodium nitrite (NaNO2) if the acid dissociation equilibrium constant, Ka, for nitrous acid (HNO2) is 5.1 x 10^-4.
For example if your compound is water and you have the information the boiling point, Tb=(99.98 C), the enthalpy of vaporization= (40.65 kJ/mol) and the molar mass= 18.02g/mol.
How many grams of NaF form when 0.580 mol of HF reacts with excess Na2SiO3?
What type of error is this associated with the concentration of Cu2+ and why is it so? what is the concentration (in mole/L or M) of Cu2+ and NO3- in the final solution
Assuming that the total pressure of the gases is 1.52 and that their mole ratio is 94 : 4.0 : 1.5 : 0.50, calculate the partial pressure (in atmospheres) of each gas.
What are the masses of CO and CO2 in the tank and what are the partial pressures of each of the three gases at 24C?
In milk at 37 C, lactobacillus acidophilus has a generation time (doubling time) of about 75 minutes. Calculate the population relative to the initial value at 30,60,90 and 150 minutes
When 20 mL of a 120 mL stock solution containing 2 M BaF2 is diluted to 80 mL, what is the concentration of F- in the new solution.
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