Sp08-Quiz-1-A-Key

Sp08-Quiz-1-A-Key - QUIZ#1(25 points CHEMISTRY 151 NAME u...

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Unformatted text preview: QUIZ #1 (25 points) CHEMISTRY 151 NAME u _ Hildebrandt January 24, 2008 Pleas' int Clearly Please also ut our name on the to of the BACK of uiz. - l. (4 pt) Perform the following math operations and express the correctly rounded answer (1) in scientific notation and (2) to the proper number of significant figures. Assume all the values come from easurements. (1531mm- suntan-lg,“ Milt, 5.35305 i r; ‘. Ward's”?! flaw {sh e * ttv' ‘-- 3-! .. .- _J A. (6.5427x10'5 +(3.17x10"‘) =» mo” B. (efzoaxto-B) = 4104 me ”were“; (000509)(60230x10“4) 13.3%!fo . 6% '55? 2. (4 pt) The coldest game in NFL history was the 1981 AFC championship game, played Jan. 10, 1982, at ”3“]:th Cincinnati's Riverfront Stadium. The wind chill at that game plunged the appargnt temperanirmn to -50.6 Celsius (°C) as the Bengals beat San Diego 27-7. (This is true!) ‘M r a “£79: gags) _ ” {arm-)2 +3: :— ‘Q‘M f A. What is - 50.8“? on the Fahrenheit (°F) scale? C 4“ —. “ " 1* 'bjl _ +';;' ' - - , » 13. What is - 50.6 “Connie Kelvinfli) scale? a—f'nu-iae ~— «Ff-"(r ”'5 2i tux-N9 K 3. (4 pt) You can approximate the how close a lightning strike is by counting the number of seconds that elapse from the flash to the sound of the thunder. Given the conversion factor below and that the speed of sound in wet air is approximately 344 meters/ second, calculate the number of seconds it would take for the sound of thunder to travel one mile fiom the lightning bolt. 1.61 kilometer = 1 mile \ \I il';.|it :1) Efi‘rrhtié ("i-l“ _‘ _ (Thulg' Mj‘jicOpdid .CM £3,619 (ht/9 U @(3Kt-f/llfll ”'00 ”:6? : H.055 Samba». :‘m t: ‘ 311' n “lulk‘ ( K ‘i|\ . . —cs ' '- - if? ' -2 4. (6 pt) Convert the following: 3‘11:le ”((1) ILL-l) : [JMS'HO M . i . A. 24.51 ill. to mL (that’s microh'ter to milliliter) B. If the dimensions of a typical postage stamp are 2.1 cm x 2.5 cm, what is the maximum number of stamps you could place on an envelope with a total front surface area of 2.52 x 10'2 m2 ? - . -;:. _ _- _ _ t U, r",‘ (1.4 (ammxnaiu): amp .... tee-«:fifiva. was: rfv'i'me t Mia—5:“ (=2 11:: m _ r ._a,m (LIKES Riff/G F l “‘ EUR? “Had/fie? - f . "1115 7.: JQYIIC fToJe-fi ] M“ ,chdclh BEL—H - L‘hi. 5_ (7 pt) Given the following table and the information already supplied in some of the blocks. Fill in the blank boxes (ones with the I» mark) with the missing information. ' Isotopic Number of Number of Number of Name of Symbol Protons Neutrons Electrons Element 1 - 3H .5 hi _ “CA“ 22 rte A WW... rrs ALL wt ITE... Elli 15am In Panama Wt: INT ' cause l9 M‘lKlNG ME - 60 amp. ...
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