Exam 1 Form D Key fall 07CHEM103A Dr. Keller

Exam 1 Form D Key fall 07CHEM103A Dr. Keller - Chemistry...

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Chemistry 103A Exam 1 Form D Answer Key. 1. (2) A 1.00 mol sample of the molecular compound sulfur trioxide (SO 3 ) (a) is 80.0 g of SO 3 (b) is 6.02 x 10 23 SO 3 molecules (c) has the same number of molecules as 16.0 g of methane (CH 4 ) (d) has 1.81 x 10 24 oxygen atoms (e) all of these 2. (2) The volume of 547 g of water is (a) 0.547 L (b) 54.7 mL (c) 547 L (d) 0.547 mL (e) 5.47 x 10 6 nL 3. (2) In the original metric system the gram was defined to be (a) 0.001 kg (b) 2.205 x 10 -3 lb (c) 10 -3 L of water (d) the weight of 1 cm 3 of water (e) 1 cm 3 of water 4. (2) On problem 8 of the first problem set 36 students chose a hair growth rate of 4 x 10 -14 Gm/fs. Convert this to m/s. (a) 4 x 10 16 m/s (b) 4 x 10 21 m/s (c) 4 x 10 13 m/s (d) 4 x 10 7 m/s (e) 4 x 10 10 m/s 5. (2) Which statement about balanced equations is incorrect ? (a) the total weight on each side is the same (b) the number of atoms on each side is the same (c) the number of molecules on each side is the same (d) conservation of matter is obeyed in a balanced equation (e) the same formula never appears on both side of the equation
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6. (2) The balanced equation for the reaction of aluminum with bromine is 2 Al + 3 Br
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This test prep was uploaded on 04/14/2008 for the course CHEM 103a taught by Professor Weso during the Fall '08 term at University of Arizona- Tucson.

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Exam 1 Form D Key fall 07CHEM103A Dr. Keller - Chemistry...

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