Chem 112 Exam AID Course Pack

However because it does not create hydronium or

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Unformatted text preview: velocity of the emitted electrons? a) b) c) d) e) 3.75 x 10- 3 m/s 6.45 x 10- 5 m/s 2.53 x 102 m/s 6.45 x 105 m/s 3.75 x 104 m/s 25. A ground state neutral atom, whose atomic number is 13, contains: a) b) c) d) e) 7 electrons is “s” orbitals some electrons in “d” orbitals 7 electrons in “p” orbitals 2 electrons in the outermost orbital 5 electrons in its valence shell 26. An ideal solution is composed of two substances, X and Y. The mole fraction of Y in the liquid phase is 0.40. Pure liquid substance X has a vapour pressure of 0.80 atm and pure Y is involatile. What is the vapour pressure of X over the solution? a) b) c) d) e) 0.24 atm 0.32 atm 0.48 atm 0.80 atm 1.20 atm 27. The density of diamond (which is made up entirely of carbon atoms) is 3.51 g/cm3. Given that the diamond lattice has a unit cell that is cubic in nature and contains 8 atoms, determine the lattice parameter (one side) of the diamond cell. a) b) c) d) e) 2.80 x 10- 8 cm 3.57 x 10- 8 cm 4.46 x 10- 9 cm 4.54 x 10- 23 cm 3.80 x 10- 23 cm Ethan Newton & Barry Zhang for SOS Winter 2012 39 28. How do we describe the hybridization around the carbon atoms (labelled 1 and 2) in the following molecule? a) b) c) d) e) sp3 around both C1 and C2 sp2 around both C1 and C2 sp around C1 and sp3 around C2 sp2 around C1 and sp around C2 sp2 around C1 and sp3 around C2 29. A grey, lustrous metal was examined using X- ray diffraction. The results of the analysis indicated that this metal is an element and crystallizes in the body centred cubic (bcc) structure, with a lattice parameter of 0.288 nm (1 nm = 10- 9m). The density of the metal was found to be 7.23 g/cm3. What metal is this? a) b) c) d) e) Cr Fe Rh Na Al 30. For the following correlation diagram, it can be concluded that. a) b) c) d) e) Bond order is 3, and the substance is paramagnetic Bond order is 1 and the substance is paramagnetic Bond order is 3, and the substance is diamagnetic The molecule is Li2 The molecule is B2 Ethan Newton & Barry Zhang for SOS Winter 2012 40 31. The coordination number is the number of: a) tetrahedral holes in a unit cell b) atoms or ions in a unit cell c) molecules in a crystal lattice d) octahedral holes in a unit cell e)neighbours in contact with an atom or ion in a crystal lattice 32 Gallium and sulfur react directly to form gallium s...
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This note was uploaded on 10/02/2012 for the course CHEM 112 taught by Professor Carran during the Winter '08 term at Queens University.

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