samplefinal chem

samplefinal chem - Chemistry 1515 Dr. B.D. Leskiw 1) B 2) A...

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Chemistry 1515 Sample Final Exam Summer 2010 Dr. B.D. Leskiw 1) B 2) A 3) E 4) B 5) B 6) D 7) E 8) C 9) C 10) B 11) D 12) C 13) A 14) E 15) D 16) A 17) C 18) D 19) C 20) E 21) B 22) C 23) D 24) C 25) E 26) B 27) D 28) A 29) D 30) B 31) D 32) C 33) D 34) E 35) E 36) C 37) C 38) E 39) A 40) D 41) A 42) D 43) A 44) B 45) B 46) C 47) D 48) E 49) B 50) A 51) A 52) C 53) B 54) E 55) B 56) E 57) D 58) C 59) D 60) A 61) D 62) E 63) A 64) C 65) D 66) E 67) A 68) B 69) C 70) A 71) B 72) D 73) B 1) Radioactive plutonium-239 is formed in nuclear reactors. How many protons, neutrons, and electrons are contained in a neutral atom of plutonium-239? a) 94 p, 239 n, 94 e b) 94 p, 145 n, 94 e c) 239 p, 94 n, 239 e d) 239 p, 145 n, 239 e e) 145 p, 94 n, 145 e 2) When a 42.10 g sample of a metal is placed in a graduated cylinder that already contains 13.2 mL of water, the water rises to the 19.8 mL mark. The density of the submerged metal in g/cm 3 is a) 6.4 b) 3.19 c) 2.13 d) 0.470 e) 0.16 3) Methanol or methyl alcohol, CH 3 OH, is used as a fuel for race cars. How many moles of water are being formed when 320 g of CH 3 OH undergo combustion according to 2 CH 3 OH + 3 O 2 b 2 CO 2 + 4 H 2 O ? a) 640 mol b) 160 mol c) 80. mol d) 40. mol e) 20. mol 4) Using: CaCO 3 + 2 HCl b CO 2 + CaCl 2 + H 2 O What is the volume of carbon dioxide gas, CO 2 , at STP obtained by complete decomposition of 40.0 g (0.400 mol) of CaCO 3 ? a) 4.48 L b) 8.96 L c) 17.9 L d) 448 L e) 1790 L
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2 5) If a 40.0 mL sample of 6.00 M NaOH is diluted with water to a volume of 120. mL, the new concentration of the solution is a) 18.0 M b) 2.00 M c) 0.500 M d) 0.0556 M e) 0.018 M 6) The 5f subshell has a) 25 orbitals and can hold a maximum of 50 electrons b) 14 orbitals and can hold a maximum of 28 electrons c) 10 orbitals and can hold a maximum of 20 electrons d) 7 orbitals and can hold a maximum of 14 electrons e) 5 orbitals and can hold a maximum of 10 electrons 7) Using: CH 3 OH (g) + O 2 (g) b CO (g) + 2 H 2 O (g) Standard enthalpies of formation are -201 kJ/mol for CH 3 OH (g), -110 kJ/mol for CO (g), and -242 kJ/mol for H 2 O (g). What is Δ H for the above reaction: a) +151 kJ b) +393 kJ c) -575 kJ d) -151 kJ e) -393 kJ 8) Considering only London forces, which would you expect to have the lowest boiling point? a) Br 2 CH 2 b) Cl 2 CH 2 c) F 2 CH 2 d) I 2 CH 2 9) For a neutral atom of iron, Fe, the ground state electron configuration would be a) [Ar] 3d 6 b) [Ar] 3d 8 c) [Ar] 4s 2 3d 6 d) [Ar] 4s 2 3d 8 e) [Ar] 4s 2 4p 6 10) Based on periodic trends, which is arranged in order of increasing atomic radius? a) Al < K < Na b) Al < Na < K c) K < Na < Al d) K < Al < Na e) Na < Al < K 11) A summary of what is consistently observed in nature is called a a) hypothesis c) theory b) qualitative observation d) scientific law 12) A US gallon equals 3.785 L, and it also equals 128 fluid ounces. A 5.00 L mini-keg of a popular Bavarian beverage contains a) 6.76 fl oz b) 96.9 fl oz c) 169 fl oz d) 640. fl oz e) 2420 fl oz
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samplefinal chem - Chemistry 1515 Dr. B.D. Leskiw 1) B 2) A...

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