Fall_09_Final_with_Key

Fall_09_Final_with_Key - CHEMISTRY 110 FINAL EXAM Dec. 14,...

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CHEMISTRY 110 FINAL EXAM Dec. 14, 2009 FORM A --------------------------------------------------------------------------------- --------------------------------------------------------------------------------- 1. How many protons, neutrons, and electrons are in a 40 Ca 2+ ion? A. p = 20, n = 20, e = 20 B. p = 18, n = 20, e = 18 C. p = 18, n = 20, e = 20 D. p = 20, n = 20, e = 18 E. p = 20, n = 20, e = 22 -------------------------------------------------------------------------------- 2. Which of the following species has the smallest ionic radius? A. O B. F ± C. Mg 2+ D. Ca 2+ E. Na + --------------------------------------------------------------------------------- 3. Which one of the bonds below is the least polar? A. Na²S B. P²S C. C²F D. Si ²Cl E. Na²Cl --------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 4. If potassium and the carbonate ion combine, what product will form? A. K 2 CO 3 B. K 3 CO 2 C. KCO 2 D. K 3 (CO 3 ) 2 E. KCO 3 --------------------------------------------------------------------------------- 5. Light is emitted from various sources. Which one of the sources below emits photons with the highest energy? A. Ar laser green 489 nm B. Hg emission: violet 436 nm C. Na vapor lights orange 589.6 nm D. distant star microwave 1350 nm E. Mg vapor uv 285.2 nm -------------------------------------------------------------------------------- 6. For the three reactions shown below, which one(s) will have mostly reactants in the mixture at equilibrium? i. 2NO(g) +O 2 (g) 2 NO 2 (g) K c = 5.0 u 10 12 ii. 2HBr(g) Br 2 (g) +H 2 (g) K c = 5.8 u 10 ± 18 iii. N 2 (g)+ O 2 (g) 2NO(g) K c = 1.5 u 10 ± 10 A. i only B. ii only C. iii only D. i and iii E. ii and iii --------------------------------------------------------------------------------
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--------------------------------------------------------------------------------- 7. What is the molecular geometry of the [TeF 5 ] ± anion? A. Tetrahedral B. Trigonal bipyramidal C. Square planar D. Seesaw E. Square pyramidal --------------------------------------------------------------------------------- 8. Which of the following molecules has the biggest dipole moment? A. CH 4 B. CH 2 F 2 C. CH 2 Cl 2 D. CCl 2 F 2 E. CF 4 --------------------------------------------------------------------------------- 9. Which of these molecules has both an amine and a carboxylic acid functional group? NH N N H N O NH 2 N N H NH 2 O H 2 NC H C CH 2 OH O ii i iii A. ii only B. iii only C. ii and iii D. i and iii E. all of them -------------------------------------------------------------------------------- 10. The molecule shown below is an isomer of octane. How many molecules of this substance are in 76 g? A. 6.02 u 10 23 B. 3.01 u 10 23 C. 4.58 u 10 25 D. 4.01 u 10 23 E. 9.03 u 10 23 --------------------------------------------------------------------------------- 11. Which substances are strong electrolytes in aqueous solution? i . H 2 SO 4 ii. CH 3 OH iii. Ca(NO 3 ) 2 i v . N H 3 A. i only B. i and ii only C. i and iii only D. ii, and iii only E. iv only --------------------------------------------------------------------------------
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-------------------------------------------------------------------------------- 12. The koala dines exclusively on eucalyptus leaves. Its digestive system detoxifies the eucalyptus oil, a poison to other animals. The chief constituent in eucalyptus oil is a substance called eucalyptol, which contains 77.87% C, 11.76% H, and the remainder O. A mass spectrum of eucalyptol shows a peak at about 154 amu. What is the molecular formula of the substance? A. C 5 H 9 O B. C 9 H 14 O 2 C. C 8 H 10 O 3 D. C 10 H 18 O E. C 11 H 22 -------------------------------------------------------------------------------- 13. Which one of the following molecules is likely to be the most soluble in water? OH OH O A B C DE -------------------------------------------------------------------------------- --------------------------------------------------------------------------------- 14. An aerosol spray can with a volume of 250 mL contains 2.30 g of propane gas (C 3 H 8 ) as a propellant. What volume would the propane occupy at STP?
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Fall_09_Final_with_Key - CHEMISTRY 110 FINAL EXAM Dec. 14,...

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