midterm_1_solutions

midterm_1_solutions - July 22, 2010 Name:_ Student #:_ CHEM...

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1 July 22, 2010 Name:__________________ Student #:__________________ CHEM 1800 Test #1 (70 marks total) Length: 1.5 hours (There is a periodic table and a list of constants at the end of the test) Part I: Multiple choice, circle the correct answer ( 1 mark each = 10 marks total ) 1. An isotope of Bromine has a mass number of 80. This refers to the number of: a) protons only b) neutrons only c) electrons only d) protons and neutrons e) protons, neutrons, and electrons 2. Which of the following is the greatest mass: a) 2.0x10 2 mg b) 0.001 kg c) 10 g d) 1x10 9 ng e) 1x10 5 μ g 3. What is the oxidation state of the bromine atom in NaBrO 3 ? a) +1 b) +2 c) +3 d) +4 e) +5 4. The average body temperature is 98.6 °F. What is this temperature in Kelvin? a) 526.00 K b) 37 K c) 310.15 K d) 20.28 K e) None of these answers
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Name:__________________ Student #:__________________ 5. The speed of light is 3.00 x 10 8 m/s. How fast is this in miles per hour (miles/h)? Use the conversion 1 mile = 1610 m: a) 4.83x10 11 miles/h b) 8.05x10 9 miles/h c) 6.71x10 8 miles/h d) 4.03x10 10 miles/h e) None of these answers 6. Which of the following set of quantum numbers is possible? a) n = 2, l = 1, m l = 0, m s = -1. b) n = 3, l = 1, m l = -2, m s = -1/2. c) n = 2, l = 2, m l = 2, m s = 1/2. d) n = 3, l = 2, m l = 2, m s = -1/2. e) n = 4, l = 2, m l = 3, m s = -1/2. 7. The mass of a golf ball is 45.9 g. If it leaves the tee with a speed of 68.0 m/s, what is the corresponding de Broglie wavelength in meters? a) 2.12x10 -37 m b) 2.12x10 -34 m c) 3.121 x 10 3 m d) 3.121 m e) None of these answers 8. How many significant figures are there in measurement 0.0013001 g? a) 8 b) 5 c) 3 d) 6 e) 7 9. Which of the following is a heterogeneous mixture? a) vodka b) bronze c) granite d) saltwater e) aluminium 10. Which element is oxidized in this balanced reaction? Fe
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midterm_1_solutions - July 22, 2010 Name:_ Student #:_ CHEM...

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