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How many moles of H3O+ must be added to 482 mL of a solution to adjust the pH from 8.80 to 5.56? Use E notation and 3 significant figures.
A "little more" than 5 mL of a saturated solution of borax is transferred to the corresponding calibrated test tube and subsequently titrated with the standardized hydrochloric acid solution.
What is the predominant form of Ile at pH 6 (assuming the pKa of the carboxylate is 3 and the amino group is 9?
What volume would a 0.0236-mole sample of helium gas would occupy at a temperature of 24°C and a pressure of 0.750 atm?
A student prepared the Ni^2+ standar solution and obtained the following buret readings for solution #2, Calculate the concentration of Ni^2+ in the resulting solution.
Calculate work (in kJ) when 422 g iron (III) oxide (MM = 159.7 g/mol) reacts with excess carbon to produce carbon dioxide gas at 445 K:
What is the coordination environment of F in a hypothetical relative of CaF2, in which Ca forms a hcp array and F occupies all the tetrahedral sites?
What IR stretches (and ranges) will occur in? What IR stretches (and ranges) will occur in an aldehyde, but not an alcohol or ketone and IR stretches (and ranges)
A sample of gas with a mass of 1.58 occupies a volume of 941 at a pressure of 753 and a temperature of 16. What is the molar mass of the gas.
Calculate the pH of a buffer that contains 0.060M ammonium chloride
What is the dew point temperature of a gas mixture that is 30% n-hexane, 30% in-heptane, and 40% air at 1 atm? What is the composition of the first "drop"?
Suppose HI at 5.00 10^-1 M, H2 at 1.00 x 10^-2 M, and I2 at 5.00 x 10^-3 M are mixed in a 5.0 L container. Calculate all concentrations at equilibruim.
The average kinetic energy of the molecules in a gas sample depends only on the temperature, T. But given the same kinetic energies, a lighter molecule will move faster than a heavier molecule.
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