[Bush] Chemistry Exam #1 - Spring 2006

[Bush] Chemistry Exam #1 - Spring 2006 - NAME Chemistry...

Info iconThis preview shows pages 1–11. Sign up to view the full content.

View Full Document Right Arrow Icon
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 2
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 4
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 6
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 8
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 10
Background image of page 11
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: NAME Chemistry 1301—02 Spring 2006 (M. A. Busch) Exam #1 PLEASE READ THESE INSTRUCTIONS CAREFULLY BEFORE BEGINNING THIS EXAMINATION. Select the single best response to each question. There is only ggg best response to each question unless otherwise indicated in the question. There are 45 questions on this examination each worth 2.22 points. (Total of 100 points.) Check your test booklet to be sure that you have a complete exam with all 44 questions. Write your NAME and SECTION NUMBER (2) on your Scantron answer sheet. Write your name on the first page of the test booklet also. Work each problem carefully on the test booklet or on the scratch paper provided. Then select the answer that you feel is the best response. ALL ANSWERS MUST APPEAR ON THE SCANTRON. Your grade will be determined only by what appears on the Scantron, not by work on the test booklet. Look over your exam and work the easiest problems first, saving the more difficult ones for last. Be sure that you have correctly indicated your final choices on the Scantron before turning in your paper. If a question is incorrectly marked on the Scantron, it will be counted wrong even if it was correctly marked on the test booklet. If you have any questions about any of the problems on this exam, it is your responsibility to ask for a clarification from the instructor during the examination. 1. A consistent framework for organizing scientific knowledge that generally gives a mental picture to help explain a phenomenon is best called a(n) A) hypothesis D) prediction E) experiment 2. Which one of the following processes best represents a physical change? A) iron rusting B) reaction of sodium metal with water C) souring of milk @dissolving sugar in water E) leaves changing color 3. Which one of the following is the best example of a single ompound? ' Q water B) iron C) milk D) sodium metal E) air 4. Which of the following is the best example of a solution? A) distilled water B) aspirin tablets C) table salt 5. Express the number 0.005580 in exponential notation. @ 1.580 x 10‘3 B) 1.580 x 103 C) 1.58 x 10'3 mwf SQ“) D) 1.58 x 103 -3 1-6807< to E) none of the above 6. How many m3 are there in 10.0 cma? Give the answer to three significant figures. , 3 -b 3 ® 1.00 x 10'5 I00m3(lm .: LOOKIO m B) 1.00 x 10‘3 ‘03 or C) 1.00 x 10‘1 '5'~3 . C) D) 1.00 x 10'2 ‘ 00’“ m E) 1.00 x 10'6 7. Which of the following represents the smallest distance? A) 1.0 mm B) 1.0 dm C) 1.0 m <:> 1.0 nm E) 1.0 km 8. How many liters are there in a cubic centimeter? (1 mL = 1 cm ) A) 10‘6 . -3 B) 103 [W3 an— l L : '.O"’0 C) 106 c;(\3 ICEXDfiWLa E) 109 9. Knowing that gravity on the moon is about 0.6 times that on the earth, how is the mass of an astronaut on the moon related to the mass of the same astronaut back on earth? fewigks ‘01», A) The mass of the astronaut is less on the moon. +4eL‘VV&LA B; The mass of the astronaut is greater on the moon. bq' The mass of the astronaut is the same everywhere. AA'Kh-snnil. ) The mass of the astronaut depends on how fast the astronaut is moving. E) None of the above is correct. 10. For the following measured numbers, the number of significant figures is indicated in parentheses. Which is not correct? A) 2038 (four) B) 40.04 (four) @0.0130 (two) WMES D) 0.00142 (three) E) 4 x 102 (one) 11. Which of the following measurements would best be considered as an exact number? A) 1.83 g 2 in 8 pennies Mid nurhhm, D) 30 miles E) 32 sec 12. The accuracy of a data set is considered to be good, if A) the data vary widely from the average value. the data are a set of closely spaced numbers. (it the average of the data is close to the actual value. ) the precision of the data is good. E) the precision of the data is poor. 3 13. Using the proper significant figures, how should the answer to the multiplication of the measurements 200.1 x 8.550 x 0.04899 43* be written? A) 83.8148 B) 83.8 83,81“!wa C) 83.815 “ @83.81 4 S"; dandrmxxdq: E) none of the above 14. Perform the indicated operations expressing the answer in L to the proper number of significant figures. 10.065 L + 8.79 L — 3.2 L = ? A) 15.655 '33 5 +_ . B) 15.66 ‘ 3‘2 @137 i D) 16 b {omd‘LP E) 20 )5? 15. An experiment calls for 10.0 mL of bromine (d = 3.12 g/mL). Since an accurate balance is available, it is decided to measure the bromine by mass. How many grams should be measured out? (A) 31.2 B) 3.21 3-‘13<'O'07L) :. 5‘128 C) 0.312 9’"; D) 3.12 E) 32.1 16. Convert 1.39 ft/s to meters per minute. (1 m = 39.37 in.) A) 3.87 B) 19.4 . ~ C) 10.0 "sci? bOEZYEJ’JL I'm _ <1? 25.4 m“ I)? 39.37% " E) 0.774 95.4 3’), min 17. Taken by itself, the fact that 8.0 g of oxygen and 1.0 g of hydrogen combine to give 9.0 g of water demonstrates what natural law? (19 Conservation of Mass B) Constant Composition C) Multiple Proportions D) The Atomic Theory E) Periodicity 18. A reaction consumes 5.0 g of A and 6.0 g of B. How many total grams of C and D should be obtained (to two significant figures)? 1A+3B->2C+4D A) 23 C) 1_ 0 QMSQJNOL-hmléw (6:9an D) 10. E) None of the above. 19. Which one of the following pairs of substances illustrates the Law of Multiple Proportions? A) 03, 02 B) H28, H20 C) Ssz, sz03 D) KCl, Mgc12 @ PC13, PCls 20. Manganese makes up 11.0% by mass of the elements found in a sample of metal. How many kg of manganese would be found in a sample of the metal weighing 183 lb? (2.21 lb = 1.00 kg) é) 911 kg 0.1100319: 20.1315 ) 9.11 kg 91.1 kg D) 0.911 kg 20.6%(L00‘Q9 ; Q.” L9 E) none of these is correct homogeneous mixture ) heterogeneous mixture C) pure mixture D) compound E) distilled mixture Zlésolution is also called a 22. How many neutrons are there in the nucleus of a 232Th atom? A) 232 qo pcdvas fax“ ModLCTa’AQ B) 90 C) 81 151 E) 142 23. How many electrons are in a neutral atom of 77Se? h A) 77 B)“ W3) @33 mmtwwwwcfium jZfiQ J?CD:>(4QL 34 E) 16 24. Naturally occurring chlorine consists of the two isotopes: chlorine-35 and chlorine—37. The atomic mass for chlorine is approximately 35.5. What are reasonable estimates of the relative percentages of chlorine—35 and chlorine-37, respectively? A) 50, 50 mus-k— hcte «(UL 587% 57 B) 25, 75 @ 75, 25 .WSC3S)+.25C37§: 355 3\w~lQec\SN—Uo.\ua, D) 33, 67 E) 67, 33 “WSW 55.7er0+ 025 good 25. Which pair of symbols below represents isotopes? A) 160,16N (E) moluo )H, He + D) He, He E) 13¢,”N —_.i—— i W.- efi 26. Which of the following is a metal? A)S B) Cl @La D) Ar E)H 27. Which of the following is a nonmetal? B) Ac C) Sc D) Nb E) U 28. A row of the Periodic Table is called a A) caste. group. period. series. E) array. 29. Which of the following is a metalloid? A) A1 B) Ga C) Sn D) In @510 30. The atomic mass of Al on the C scale is 27.0. On a new scale in which C was assigned an atomic weight of 3.00 instead of 12.0, the atomic weight of Al would be A) 4.00. l2.o : sow B) 18.0. 6T 7 C) 9.00. D) 108. n /® 6.75. x“ 6‘75 31. Which inventor/discovery is mismatched in the following list? A) Lavoisier—Law of Conservation of Mass Proust—mass of an electron ) Dalton—Atomic Theory of Matter D) Mendeleev—Periodic Table E) Arrhenius—acids produce H* 32. Which one of the following compounds is molecular? A) Fe203 B) NaCl (:» NCl3 D) CuCl2 E) CdS 33. Which one of the following compounds is ionic? 34. The atomic mass unit (u) is presently based on assigning an exact mass (in u) to an isotope of A) hydrogen B) oxygen C) iron D) sodium ® something else C... )2 35. The molecular formula of a compound is always the empirical formula. A) different from B) the same as C) simpler than a whole number multiple of E) a whole number divisor of 36. Which one of the following names is incorrectly paired with its symbol? A) sodium = Na antimony At C) palladium = Pd Re D) rhenium E) all of the above are correctly paired. 37. Which one of the following names is incorrectly paired with its symbol? A) gallium = Ga B) selenium = Se C) platinum = Pt (:5 germanium = Gd E) all of the above are correctly paired. 38. Which one of the following names is incorrectly paired with its symbol? bismuth = B B) lead = 2d TN, C) mercury = Hg D) barium Ba E) all of the above are correctly paired. ll 39. Which one of the following names is igcorrectly paired with its symbol? A) vanadium = V cesium = Ce C) scandium = Sc D) tungsten = W E) all of the above are correctly paired. 40. Which one of the following names is incorrectly paired with its symbol? A) osmium = Os D) thallium = Tl E) all of the above are correctly paired. 41. Which one of the following names is incorrectly paired with its symbol? A) potassium = K argon = A C) iodine = I D) thorium = Th E) all of the above are correctly paired. 42. Which one of the following names is incorrectly paired with its symbol? A) chromium = Cr B) fluorine = F Rn Fe \/ ZjDall of the above are correctly paired. H C) radon D) iron 43. Which one of the following names is incorrectly paired with its 3 mbol? @ rubidium = Ru B) arsenic = As C) beryllium = Be D) strontium = Sr E all of the above are correctly paired. lO 44. Which one of the following names is incorrectly paired with its symbol? A) bromine = Br B) chlorine = Cl Zr C) zirconium D) cadmium = Cd (:) all of the above are correctly paired. 45. Which one of the following names is incorrectly paired with its symbol? A) silver = Ag B) copper = Cu C) zinc = Zn ) rhodium = Rh éb all of the above are correctly paired ll ...
View Full Document

This note was uploaded on 04/08/2008 for the course CHE 1301 taught by Professor Klausmeyer during the Spring '08 term at Baylor.

Page1 / 11

[Bush] Chemistry Exam #1 - Spring 2006 - NAME Chemistry...

This preview shows document pages 1 - 11. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online