Question 1 (for 1st Year)
An unknown gas effuses at a rate that is only 0.355 times that of O2 at the same temperature. What is the identity of the unknown gas?
Question 2 (for 2nd Year)
A solution is prepared by mixing Mt moles of the salt MCl2 (which dissociates completely to M2+ + 2Cl-) and Lt moles of the ligand HL in 1 L. The following reactions may occur: M2+ + L-) ML+ K = 1.0 × 108 HL(aq) L- + H+ Ka = 1.0 × 10-5
(a) Write a mass balance for the metal species.
(b) Write a mass balance for the ligand species. (c) Write a charge balance.
(d) Suppose that Mt = Lt = 0.1 M (exactly) and the pH is somehow fixed at 5.00.
(This means that the charge balance no longer applies.) Use the equilibria and the two mass balances to find the concentrations of ML+, M2+, L-, and HL.
Question 3 (for 3rd Year)
Determine the heat capacity ratio for methane using the equipartition theorem considering and without considering the effect of vibrational motion.
Question 4 (for 4th Year)
What is the wavelength of radiation needed to promote an electron from E9 to E10 if the length of the box is 15.0nm and the mass of an electron is 9.11X10-31kg?
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