Test 2, F 07, Form A

Test 2, F 07, Form A - Chemistry 1035 Second Test This is...

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Chemistry 1035 Second Test This is FORM A . October 17, 2007 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. An aqueous solution is prepared by dissolving 20.0 grams of potassium sulfate, K 2 SO 4 (FW = 174) in sufficient water to prepare 500 milliliters of solution. What is [K + ], the molarity of K + ion, in this solution? 1. 0.115 M 2. 0.230 M 3. 0.460 M 4. 0.080 M 2. At 25.0 o C, the pOH of a solution is 4.75, what is [H + ] in the solution? 1. [H + ] = 9.25 M 2. [H + ] = 1.78x10 -5 M 3. [H + ] = 5.62x10 -10 M 4. [H + ] = 9.61x10 -5 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 a sample of the compound produces 5.50 grams of CO 2 and 4.50 grams of water. What is the mass of hydrogen in the sample that was combusted? 1. 1.50 grams H 2. 0.500 gram H 3. 0.250 gram H 4. 1.00 gram H
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4. Which of the following solutions is most basic ? 1. Solution A: pH = 9.5 2. Solution B: pOH = 5.0 3. Solution C: [H + ] = 5.00x10 -11 M 4. Solution D: [OH - ] = 2.00x10 -5 M 5. How many milliliters of 0.200 M H 3 PO 4 solution are required to neutralize 40.0 mL of 0.150 M KOH solution? H 3 PO 4 + 3 KOH K 3 PO 4 + 3 H 2 O 1. 1.67 mL 2. 5.00 mL 3. 10.0 mL 4. 30.0 mL 6. Which solution has the highest total concentration of ions? 1. 0.20 M (NH 4 ) 2 SO 4 2. 0.20 M FeCl 3 3. 0.20 M KNO 3 4. 0.20 M C 6 H 12 O 6 7. Which of the following substances is not an electrolyte? 1. MgBr 2 2. SF 6 3. Ca(OH) 2 4. HC 2 H 3 O 2 5. All four of these substances are electrolytes. 8.
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This note was uploaded on 04/14/2008 for the course CHEM 1035 taught by Professor Jgdillard during the Fall '07 term at Virginia Tech.

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Test 2, F 07, Form A - Chemistry 1035 Second Test This is...

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