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Test_2__F_06__Form_A - Chemistry 1035 Second Test This is...

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Chemistry 1035 Second Test This is FORM A . October 18, 2006 I promise that I will abide by the Virginia Tech Honor Code while taking this test. Signature Printed Name ___________________________ c = 3.00x10 8 m/s h = 6.63x10 -34 J . s Avogadro’s Number = 6.02x10 23 The ionization energy for hydrogen, if the electron is in the n = 1 main energy level, is 2.18x10 -18 J. 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 10 4p 6 5s 2 4d 10 5p 6 6s 2 4f 14 5d 10 6p 6 7s 2 5f 14 6d 10 1. Arrange the following aqueous solutions from least acidic to most acidic. Solution A pH = 9 Solution B pOH = 6 Solution C [H + ] = 1.00x10 -5 M Solution D [OH - ] = 1.00x10 -10 M 1. D (least acidic) then C then B A (most acidic) 2. D (least acidic) then B then C A (most acidic) 3. A (least acidic) then B then C D (most acidic) 4. C (least acidic) then B then A D (most acidic) 5. D (least acidic) then B then A C (most acidic) 2. At 25.0 o C, the pH of a solution is 2.13, what is [OH - ] in the solution? 1. [OH - ] = 1.35x10 -12 M 2. [OH - ] = 11.87M 3. [OH - ] = 7.00x10 -6 M 4. [OH - ] = 4.69x10 -15 M 3. A compound of carbon and hydrogen is combusted completely with O 2 to produce CO 2 and H 2 O. In a particular experiment, the combustion of 0.280 gram of the compound produces 0.880 gram of CO 2 and 0.360 gram of water. What is the empirical formula for the compound? 1. CH 2. CH 2 3. C 2 H 4. CH 3 5. C 3 H
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4. If 100 mL of 0.300M aqueous C 2 H 5 OH solution is mixed with 200 mL of a 1.50M aqueous C 2 H 5 OH solution, what is the molarity of the final solution? 1. 0.600M 2. 0.750M 3. 0.900M 4. 1.10M 5. 1.30M 5. An aqueous solution is prepared by dissolving 50.0 grams of chromium(III) chloride, CrCl 3 , in sufficient water to prepare 2.00 liters of solution. What is the molarity of chloride ion (Cl - ) in this solution? 1. 0.158M 2. 0.316M 3. 0.474M 4. 0.947M 6. Which of the following substances is not an electrolyte? 1. KOH 2. CaCl 2 3. HBrO 3 4. CH 3 OH 7. Which one of the following acids is a strong acid?
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