Practice_Exam3_key.pdf - Practice for Examination 3 BCH 463 A Multiple Choice Questions 1 Calculate the wavelength of the photon released when an

Practice_Exam3_key.pdf - Practice for Examination 3 BCH 463...

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Practice for Examination 3 BCH 463 A. Multiple Choice Questions 1. Calculate the wavelength of the photon released when an electron makes a transition from an n = 2 state to an n = 1 state in molybdenum. a. 7.0 nm b. 0.07 nm c. 1.2 nm d. 0.012 nm ࠵?=࠵?࠵?!࠵?!12!11!=࠵?࠵?࠵?=43࠵?!࠵?!=4342!(1.1࠵?10!࠵?࠵?!!)=6.87࠵?10!࠵?࠵?=0.069࠵?࠵? 2. For an atom, Zeff is 3.7. Calculate the ionization energy (for hydrogen the ionization energy is 1312 kJ/mol). a.18,000 kJ/mol b.23,000 kJ/mol c.29,000 kJ/mol d.230,000 kJ/mol ࠵?!""!"#$=࠵?!"#$࠵?!=18,000࠵?࠵?/࠵?࠵?࠵?1312࠵?࠵?/࠵?࠵?࠵?=3.7 3. The orbital boundary surface represents a.the radius for which there is a 90% chance of finding the electron b.The average radius c.The most probable radius d. An arbitrary radius, only the shape important 4. For the Schrodinger equation, the value of ࠵?must be a. a small number b. a nonzero integer c. a nonnegative integer d. an integer between ±n 5. For the hydrogen atom, Schrodingers’ Equation predicts that a. the 2s and 2p orbitals have the same energy b. the 2s has a larger energy c. the 2p has a larger energy d. no prediction is made
6. Which of the quantum numbers in NOT determined from the Schrodinger equation a.The principal number b.The angular momentum termlc.The magnetic term md.The spin term m n l s 7. What is the energy for the 2ndexited state of a harmonic oscillator a. !࠵?b. !࠵?c. !࠵?d. !࠵?࠵?=࠵?+12࠵?=2+12࠵?=52࠵? ! ! ! ! 8. Which is NOT true, hydrogenase a. catalyzes the formation of hydrogen gas b. has either a Ni-Fe or Fe-Fe cluster c. was shown by FTIR that all metal ligands were Cys d. CO and CN bind to the metals 9. If the mass attached to a spring is doubled, the frequency a.increases by 2 b.decreases by 1/2 c.increases by 1.4 d.decreases by 1/1.4 ࠵? ࠵?࠵?࠵?࠵?࠵?࠵?࠵?࠵? = ࠵? ࠵? ࠵? 2 ࠵? = 1 2 ࠵? ࠵? = 1 1 . 4 ࠵? ࠵?࠵?࠵?࠵?࠵?࠵?࠵?࠵? 10. Calculate the vibrational frequency for a proton, if k = 650 N/m a. 7.3 x 10 +13 s -1 b. 9.9 x 10 +13 s -1 c. 7.7 x 10 +16 s -1 d. 9.4 x 10 +16 s -1 ࠵? = 1 2 ࠵? 650 N / m 1 . 67 ࠵? 10 ! !" ࠵?࠵? = 9 . 9 ࠵? 10 !" ࠵? ! !

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