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.
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A. (6.5427x10'5 +(3.17x10"‘) =» mo” B. (efzoaxtoB) = 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 277. (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
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13. What is  50.6 “Connie Kelvinﬂi) scale? a—f'nuiae ~— «Ff"(r ”'5 2i tuxN9 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
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. —cs ' '  if? ' 2 4. (6 pt) Convert the following: 3‘11:le ”((1) ILLl) : [JMS'HO M
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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
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 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
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_ “CA“ 22 rte A WW... rrs ALL wt ITE...
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Wt: INT ' cause l9 M‘lKlNG ME  60 amp. ...
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 Spring '08
 HILDEBRANT
 Chemistry

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