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ChemExam1Review - lin(el8462 – Sample Exam One – Shear...

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Unformatted text preview: lin (el8462) – Sample Exam One – Shear – (51145) 1 This print-out should have 30 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. In all cases, select the answer that BEST answers the question asked. The total points on this exam is 300. Some questions provide fundamental constants in addition to those given here and on the scantron sheet. Watch your units! Shear 52375 c = 3 . 00 × 10 8 m/s h = 6 . 626 × 10 − 34 J · s m e = 9 . 11 × 10 − 31 kg N A = 6 . 022 × 10 23 mol − 1 λ = h mv Δ E = R Z 2 parenleftbigg 1 n 2 1- 1 n 2 2 parenrightbigg where R =- 2 . 178 × 10 − 18 J ψ n ( x ) = parenleftbigg 2 L parenrightbigg 1 2 sin parenleftBig nπx L parenrightBig E n = n 2 h 2 8 mL 2 n = 1 , 2 , 3 , ··· 001 10.0 points Which of the following describes a chemical change? 1. wood is carved 2. water is heated from 0 ◦ C to 50 ◦ C 3. alcohol evaporates 4. gasoline burns in an engine 002 10.0 points Ethylene (C 2 H 4 ) burns in oxygen to produce carbon dioxide and water. What is the correct form of the balanced chemical equation that describes this reaction? 1. C 2 H 4 + 3 O 2 → 2 CO 2 + 2 H 2 O 2. C 2 H 4 + 4 O 2 → 2 CO + 2 H 2 O 3. 2 C 2 H 4 + O 2 → 2 CO 2 + H 2 O 4. C 2 H 4 + 2 O 2 → 2 CO + 2 H 2 O 5. C 2 H 4 + O 2 → CO 2 + H 2 O 6. C 2 H 4 + 6 O 2 → 2 CO 2 + 2 H 2 O 003 10.0 points Iron reacts with Cl 2 according to the equation 2 Fe(s) + 3 Cl 2 (g) → 2 FeCl 3 (s) . How many moles of Cl 2 is needed to react with 4.4 mol Fe? 1. 3.0 2. 6.6 3. 4.4 4. 3.3 004 10.0 points Consider the reaction CaCN 2 + 3 H 2 O → CaCO 3 + 2 NH 3 . How much NH 3 is produced if 187 g of CaCO 3 are produced? 1. 3.74 mol 2. 2.13 mol 3. 63.6 mol 4. 36.1 mol 5. 72.3 mol lin (el8462) – Sample Exam One – Shear – (51145) 2 6. 1.06 mol 005 10.0 points Decreasing wavelength of light goes in the order 1. ultraviolet, infrared, visible 2. infrared, visible, ultraviolet 3. ultraviolet, visible, infrared 4. visible, ultraviolet, infrared 5. infrared, ultraviolet, visible 6. visible, infrared, ultraviolet 006 10.0 points10....
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This note was uploaded on 04/02/2012 for the course CH 301 taught by Professor Fakhreddine/lyon during the Spring '07 term at University of Texas.

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ChemExam1Review - lin(el8462 – Sample Exam One – Shear...

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