Sp06_Final_with_Key

Sp06_Final_with_Key - Chemistry 12 Final Exam Form A May 5...

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Chemistry 12 Name _______________________ Final Exam Form A Section _______________________ May 5, 2006 Student No._______________________ IMPORTANT : On the scantron (answer sheet), you MUST clearly fill your name , your student number , section number , and test form (white cover = test form A; yellow cover = test form B). Use a #2 pencil. There are 38 questions on this exam. Check that you have done all of the problems and filled in the first 38 bubbles on the scantron. The maximum score on this exam is 50 points. Your score will be reported in percents (max 100%). Exam policy x C a l c u l a t o r s w i t h t e x t - p r o g r amm a b l e m em o r y . x N o e l e c t r o n i c d e v i c e s , e x c e p t f o r s imple scientific calculators are allowed (specifically calculators with text-programmable memory or communication capabilities are not allowed). x R e l e v a n t d a t a a n d f o rm u l a s , i n c l u d i n g t h e periodic table, are attached at the end of this exam. x Y o u r g r a d e w i l l b e b a s e d o n l y o n w h a t i s o n t h e s c a n t r o n f o . x T h e a n s w e r k e y w i l l b e p o s t e d o n t h e web after the exam (under "News"). Hints x A s y o u r e a d t h e q u e s t i o n , u n d e r l i n e o r c i r cle key words to highlight them for yourself. Avoid errors from "mis-reading" the question. x P a y a t t e n t i o n t o u n i t s a n d m a g n i t u d e s (decimal places) of numbers obtained from calculations. x T h e r e i s n o p e n a l t y f o r g u e s s i n g .
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3 Chem 12, Final Exam May 5, 2006 Form A --------------------------------------------------------------------------------------------------------------------- 1. Which transition represents the greatest energy absorption for an electron in a Bohr's-model hydrogen atom? A . n = 3 t o n = 6 B . n = 9 t o n = 4 C . n = 1 t o n = 4 D . n = 5 t o n = 3 E . n = 2 t o n = 5 --------------------------------------------------------------------------------------------------------------------- 2. For an atom with many electrons, which statement about electrons and orbitals is false ? A. Orbitals with the same n and l values of their quantum numbers are degenerate. B. There is a non-zero electron density on the nucleus of all s orbitals. C. Each orbital can hold zero, one, or two electrons. D. Electrons with the same n and l values of their quantum numbers always have the same average separation from the nucleus. E. 3d orbitals are lower in energy than the 4s orbitals. --------------------------------------------------------------------------------------------------------------------- 3. Which element has the largest 1 st ionization energy? A. F B. O C. Br D. S E. C --------------------------------------------------------------------------------------------------------------------- 4. Which of the following ionic compounds has the greatest lattice energy? A . L i F B . N a F C . K F D . L i C l E . L i B r --------------------------------------------------------------------------------------------------------------------- 5. Which of the following atoms can have an expanded octet? A . N B . F C . L i D . O E . I --------------------------------------------------------------------------------------------------------------------- 6. Which of the following molecular geometries cannot result for a compound with five electron d o m a i n s ? A. bent B. seesaw C. T-shaped D. trigonal bipyramidal E. linear ---------------------------------------------------------------------------------------------------------------------
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4 7. Caffeine was found to have a mass composition of 49.98% C, 5.19% H, 28.25% N, and 16.48% O. The osmotic pressure of a solution of 24.28 g in 1.000 L of water is 3.057 atm at 25 o C. What is the molecular formula of caffeine?
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Sp06_Final_with_Key - Chemistry 12 Final Exam Form A May 5...

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