MT2 2010 ANS - ANSWER KEY Part 1. Multiple Choice (14 marks...

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ANSWER KEY Part 1. Multiple Choice (14 marks total) For each numbered statement below, circle the letter that corresponds to the best answer. There is only one correct answer per question. Each question answered correctly is worth 2 marks. 1. Which of the following atomic orbitals does not exist? (a) 4 s (b) 2 p z (c) 4 p x (d) 2 d xy (e) 43 d x 2 -y 2 2. Which of the following statements is true? (a) Ice has a lower density than liquid water due to hydrogen bonding. (b) Water molecules are non-polar. (c) Upon freezing, water forms a network covalent solid. (d) Water has a higher boiling point than hydrogen sulfide because the London forces between water molecules are stronger. (e) Water vapor contains H 2 and O 2 . 3. Arrange the following species in order of increasing melting point. I 2 Al 2 O 3 H 2 O CH 3 OH Ar (a) Ar < CH 3 OH < H 2 O < I 2 < Al 2 O 3 (b) CH 3 OH < H 2 O < I 2 < Al 2 O 3 < Ar (c) Ar < CH 3 OH < H 2 O < Al 2 O 3 < I 2 (d) Ar < H 2 O < CH 3 OH < I 2 < Al 2 O 3 (e) H 2 O < I 2 < Al 2 O 3 < CH 3 OH < Ar 4. A quantum particle (e.g. electron) can never be at rest. Why? (a) As a result of Planck’s equation. (b) As a result of the Heisenberg Uncertainty Principle. (c) As a result of the Photoelectric Effect. (d) Because the speed of light is a constant. (e) As a result of wave interference.
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5. Blue laser pointers emit light at 473 nm. What is the energy of blue laser pointer photons in J? (a) 4.20
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This note was uploaded on 01/15/2012 for the course CHEM 121 taught by Professor Donnecke during the Winter '07 term at The University of British Columbia.

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MT2 2010 ANS - ANSWER KEY Part 1. Multiple Choice (14 marks...

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