# Final Form A with an - CHM 2045 Final Exam(Form Code A Spring 2011 Instructions On your scantron sheet enter and bubble in your name UF ID

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CHM 2045 Final Exam (Form Code A) Spring 2011 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 your scantron. Possibly useful info: R=0.0821 L•atm/mol•K ; R=8.314 J/mol•K ; 1 J = 1 kg•m 2 /s 2 ; h = 6.626 x 10 -34 J•s; c = 2.998 x 10 8 m/s; specific heat capacity (H 2 O) = 4.184 J/g• °C 1. Calculate the concentration (in molarity) of a NaOH solution if 25.0 mL of the solution are needed to neutralize 17.4 mL of a 0.312 M HCl solution. (1) 0.146 M (2) 0.217 M (3) 0.446 M (4) 0.517 M (5) 0.733 M 2. A solid will float on any liquid that is more dense than the solid. The volume of a piece of calcite weighing 35.6 g is 12.9 cm 3 . On how many of the following liquids will calcite float? Carbon tetrachloride (d=1.60 g/cm 3 ); methylene bromide (d=2.50 g/cm 3 ); tetrabromoethane (d=2.96 g/cm 3 ); methylene iodide (d=3.33 g/cm 3 ) (1) 1 (2) 2 (3) 3 (4) 4 (5) 0 3. What is the molecular formula of a gaseous compound (composed solely of C, H, and Cl atoms) whose mass is 0.568 g at 26°C and 740 torr in a 120 mL flask? (1) NH 4 NO 3 (2) C 2 H 5 Cl (3) C 2 H 4 Cl 2 (4) CHCl 3 (5) CCl 4 4. For the XeF 4 molecule, what is the hybridization on Xe, the number of lone pairs (LP), and does it possess a dipole moment (DM) or not? (1) d

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## This document was uploaded on 10/26/2011 for the course CHM 2045 at University of Florida.

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Final Form A with an - CHM 2045 Final Exam(Form Code A Spring 2011 Instructions On your scantron sheet enter and bubble in your name UF ID

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