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1. a .1276 g sample of a monprotic acid, molar mass 1.10 x 10^2, was dissolved in 25 mL of water and titrated with .0633 M NaOH. After 10 mL if base had been added the pH was determined to be 5.27. What is the Ka for the acid?
2. calculate the ph at the equivilance point for the following titration: .20 M HCl versus .20 M methylamine. Ka of methylammonium is 2.3 x 10^-11
3. 30 mL if .10 M Ba(NO3)2 is added to 10 mL of .10 M Na2CO3 and resulting concentration in solution of Ba is .075 M CO3 is .025 M. What is the value of the reaction quotient?
A sample of carbon dioxide gas occupies 617 mL at 0.812 atm and 11?C. What will the pressure be at a volume of 717 mL and a temperature of 16?C?Answer in units of atm
the density of the fuel is 0.78 g/mL the initial temperature of the water is 25 degrees celcius and the standard enthalpy of formation is -224.4 kJ/mol
calculate the energy levels of the pi-netwrok in octatetraene c8h10 using the particle in the box model. to calculate
aluminum oxide decomposes to produce aluminum metal and oxygen gas. when 9.8g of aluminum oxide decomposes how many
What mass of precipitate will form if 1.50 L of concentrated Pb(ClO3)2 is mixed with 0.850 L of 0.190 M NaI? Assume the reaction goes to completion.
Calculate the percent error in the experiment using the experimental and theoretical values of the mass percent of oxygen.
Which way did the system shift to achieve equilibrium. What is Kc for this reaction, and what are the equilibrium concentrations of all relevant components
Calculate the pH of a solution that is 1.00 M HNO2 and 1.00 M NANO2
lightbulb is visible light and that the average wavelength og the light is 550 nm, how many photons are emitted by the lightbuld each second?
What does the angular momentum quantum number determine. Check all that apply. A.) the overall size of an orbital B.) the energy of the electron on the outer shell
Given tyrpsin digest yields the following amino acid sequences: k, tyk, wag, and spwr and a chymotyrpsin digest yields ag, rw, ty, and kkspw. what is the primary amino acid sequence of the antibiotic peptide
What is the vapor pressure of SiCl4 (in mm Hg) at 23.5 C? The vapor pressure of SiCl4 is 100 mm Hg at 5.4 C and Delta H
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