Exam 1 Form Code A

Exam 1 Form Code A - CHM 2045 Exam 1 (Form Code A) Fall...

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CHM 2045 Exam 1 (Form Code A) Fall 2008 Instructions: On your scantron sheet enter and bubble in your name , UF ID number (start on the leftmost space and leave any extra spaces blank), and Form Code (see above). You may retain your exam sheet (mark your answers on it and the scantron sheet) and any other sheets. Turn in only the scantron. 1. How many moles of oxygen are required to combust one mole of ammonia and produce dinitrogen tetroxide and water as sole products? (1) 0.57 mols (2) 1.75 mols (3) 3.5 mols (4) 4.0 mols (5) 7.0 mols 2. Given the thermochemical information: ∆H o formation (H 2 O (liq) ) = − 285.8 kJ/mol ∆H o formation (C 2 H 2 (gas) ) = − 26.7 kJ/mol ∆H o formation (CO 2 (gas) ) = − 393.5 kJ/mol The molar heat of combustion of acetylene, C 2 H 2 (gas) , is closest to? (1) − 26.7 kJ/mol (2) − 695.2 kJ/mol (3) − 706.00 kJ/mol (4) − 1046.1 kJ/mol (5) − 1072.3 kJ/mol 3. If an aqueous NaOH solution is 14.6% by mass NaOH and has a density of 1.10 g/mL, the molarity, M , of this solution is closest to (1) 5.0 M (2) 4.0 M (3) 4.5 M (4) 3.5 M (5) 3.0 M 4. Which one of the following ions has the same number of electrons and neutrons? (1) 48 Ti 4+ (2) 35 Cl 1– (3) 14 N 3– (4) 40 Ar 2+ (5) 80 Br 1– 5. In normal blood, there are about 5.4 x 10 9 red blood cells per milliliter. The volume of a red blood cell is about 90 x 10 –12 cm 3 , and its density is 1.096 g/mL. How many liters of whole blood would be needed to collect 0.5 kg of red blood cells? (1)
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This note was uploaded on 04/11/2010 for the course CHM 2045 taught by Professor Mitchell during the Spring '07 term at University of Florida.

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Exam 1 Form Code A - CHM 2045 Exam 1 (Form Code A) Fall...

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