chem100 s07 exam1 - 6~n‘?“ ’ HUXk’d FormB...

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Unformatted text preview: 6~n‘?“ ’ HUXk’d FormB Chemistry 100 Introduction to General Chemistry Spring Semester, 2007 Exam 1-150 points possible On this page print your name, your lab section number, and the name of your TA. Also sign this test booklet. Nan-___Lab section {a TA 6‘5 j a k Signature M W . ' The exam consists of 21 questions Partial credit is given only for work that is legible and logically and clearly presented. Please include all set-ups, units, and unit cancellations. If you erase, do so completely, partial or unclear erasures may be graded as incorrect. You may use a non- programmable calculator on this test. A copy of the Periodic Table of Elements is provided on the last page. For full credit ive numerical answers in scientific notation and use the a r0 riate number of si nificant fi ures. 011] answers written in the s ace rovided will be raded. The exam will last 50 minutes. You may not be able to finish the entire exam so choose the problems that your work on carefully. If you finish early, please leave quietly. Problem 1 C ____/6 Problem 12 Q /6 Problem 2 5 ____/6 Problem 13 Q /6 Problem 3 a /6 Problem 14 L /6 Problem 4 fl /6 Problem 15 8 /8 Problem 5 Q /6 Problem 16 6 /6 Problem 6 Q /6 Problem 17 /9 Problem 7 z /6 Problem 18 /9 Problem 8 /6 Problem 19 /6 Problem 9 a /6 Problem 20 Problem 10 fl /6 Problem 21 S /24 Problem 11 h /6 Total points / 150 \ Form B 1) According to your text, which of the following is the best definition of “chemistry”? A) The study of atoms and their sizes ' B) The study of chemicals and their structures C) The study of substances and their explosions @ The study of matter and its changes B) All of the above 2) What is 50° C on a Fahrenheit scale? A 323°F u .. @3122°F (W'%)*32 ' C) 106° F ‘ D) 148°F 610 s '22 =~ V“ E) 58°F m < 2 3 C)4 ,» @6 E)8 3) How any electrons occupy the 2p subshell of a neutral silicon atom? } B) 4) A solid block of lead weighs 8.6 kg. What is the volume of the lead block if the density of lead is 11.4 g/cm3? . )980m3 ' s.“ x‘o‘3 750 cm3 \l- ‘l "' 3 C) 1,300 cm3 “" D) 1.33 cm3 E) 0.098 cm3 cw“ 5) Which of the following atoms has the lowest ionization energy? A) Ca E? K C) C D) Se E) F 6) Which of the following is a nonmetal? A) Sr B) Cu C) Li (9) Cl E) Hg Form B 7) Which of the following elements is the most electronegative? 0% C) P Be E) Al 8) A pair of atoms are isotopes if: . A) they have the same number of protons but a different number of electrons B) they have the same number of electrons but a different number of protons C) they have the same number of neutrons but a different number of electrons @ they have the same number of protons but a different number of neutrons E) all of the above are isotopes 9) Which is an example of a chemical reaction? A) Glass shattering ® Iron rusting C) Popcorn popping D) Water freezing E) Oil dripping 10) How many centigrams are in a kilogram? A) 100 1,00 ) B) 1/1000 , ( w )A .9» C 10,000 ‘13 5 100,000 E) 1,000,000,000 11) In the quantum mechanical representation of an atom, the quantum designation 5, d, and f are referred to as: A) Orbitals B) Electron pairs C) Energy levels ) Shells 'Subshells 12) Which of the following is NOT a mixture? A) Blood B) Root beer 9 Sugar ) Toothpaste E) Concrete \ Form B 13) What is the chemical formula for an ionic compound formed between Iron(III) and oxygen? A) F60 " 4L * B) F602 FL 0 C) FeO3 D) Fe202 14) Which group of elements on the periodic table will ionize to give a —1 charge? A) Alkali metals (Group I) B) Alkaline earth metals (Group II) C Transition metals Halides (Group-VII) ., E) Noble gases (Group VIII) - III“ I 15) The Australian swimmer Ian Thorpe can swim 400.0 m in 220.08 seconds. How fast is that in miles per hour (1 mile = 1.609 km)? , H" ‘. r t V ‘ ‘ l ‘ “l j V\“: L . _ . .‘ .3600 3.2 0-013 “’30 v" \Job‘l \W" \ ‘nt’ 16) Express the number 3WMLO§Q§DQ89S in scientific notation using only three significant digits. 30 6 a. s o x to 17) Determine the number of protons, neutrons, and electrons in each of the following: g 123Sb protons ‘3‘ neutrons '1 2 electrons SI 192Ir2+ protons ' T I neutrons \\ S electrons {IS 18) Name the following compounds: Cu(N02); o t 1: angle RuPOZ" Pw nun-ton gm WMQMH NifiBr w. on» w Form B 19) Complete the following chart by filling in the blanks Neutral Element 77 122 64 se a 7 a __u- Write the chemical formula and charge on the polyatomic anion sulfate. U\ D .1: 9:} £6) u flomplete the following table. Draw the Lewis dot structure, give the bond angle, electron pair geometry, molecular geometry, and state whether the molecule is polar or nonpolar. Angle Electron pair Molecular Polar or comely" _eometr non - olar? ' W “00'. / L\Q_0‘ y ‘bcn’t v0‘4f so all ...
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