110_Fa11_Ex2-A - CHEMISTRY 110 EXAM 2 OCTOBER 10, 2011 FORM...

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CHEMISTRY 110 EXAM 2 OCTOBER 10, 2011 FORM A --------------------------------------------------------------------------------- 1. How much P is contained in 10.0g of H 3 PO 4 ? A. 1.25 g B. 3.16 g C. 3.33 g D. 6.46 g E. 8.23 g --------------------------------------------------------------------------------- 2. Which of the following has the largest number of atoms? A. 0.2 moles of H 2 SO 4 B. 0.5 moles of HCl C. 2.0 g of H 2 D. 6.0 g of O 2 E. 8.0 g of H 2 O --------------------------------------------------------------------------------- 3. Which of the following molecular formulas could be associated with an alkyne ? A. C 13 H 28 B. C 22 H 44 C. C 8 H 16 D. C 15 H 28 E. C 10 H 22 --------------------------------------------------------------------------------- --------------------------------------------------------------------------------- 4. The percent composition of C in a 0.1453 g of an unknown hydrocarbon is found to be 82.66% by mass. What is the empirical formula of the compound? A. CH B. C 2 H 3 C. CH 2 D. C 2 H 5 E. CH 3 --------------------------------------------------------------------------------- 5. What functional groups are present in the molecule shown? 1. alcohol 2. aldehyde 3. carboxylic acid 4. ketone A. 1 only B. 1 and 4 only C. 3 only D. 2 only E. 2 and 4 only --------------------------------------------------------------------------------- O OH
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--------------------------------------------------------------------------------- 6. What are the hybrid orbitals found on the central atoms in SiF 4 , SF 4 , and XeF 4 ? SiF 4 SF 4 XeF 4 A. sp 3 sp 3 sp 3 B. sp 3 sp 3 d 2 sp 3 d C. sp 3 d 2 sp 3 d sp 3 d 2 D. sp 3 sp 3 d sp 3 d 2 E. sp 3 d sp 3 d 2 sp 3 d 2 --------------------------------------------------------------------------------- 7. What are the correct molecular geometries for the regions of the molecule shown below. A. trigonal pyramid tetrahedral trigonal planar B. trigonal planar tetrahedral trigonal pyramid C. trigonal planar trigonal planar trigonal pyramid D. trigonal pyramid tetrahedral square planar E. tetrahedral tetrahedral tetrahedral --------------------------------------------------------------------------------- H 2 N CH 2 C O H -------------------------------------------------------------------------------- 8. Which one of these molecules has the most ! bonds? --------------------------------------------------------------------------------- 9. Consider the generic formula AB 4 . Using the VSEPR model as discussed in lecture, how many different molecular geometries are possible for this compound? A. 1 B. 2 C. 3 D. 4 E. 5 --------------------------------------------------------------------------------- O A B C O D E O
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--------------------------------------------------------------------------------- 10. Which of these molecules exhibits the greatest dipole moment?
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This note was uploaded on 01/18/2012 for the course CHEM 110 taught by Professor Hofmann,brucerob during the Fall '08 term at Pennsylvania State University, University Park.

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110_Fa11_Ex2-A - CHEMISTRY 110 EXAM 2 OCTOBER 10, 2011 FORM...

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