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Quiz 1 Key - Dr.Loza Name 121 Chemistry Fall2008 Quiz1...

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Dr.Loza Name Chemistry 121 Fall 2008 Quiz 1 Tuesday 8:30 am September 30, 2008 20 minutes Rec.lnstr. P', f^ t ( 3t ?NT Carbon c 4xlO2nmtopm V r t * i l M F 0.06mL to lrL 8 x 1 0 5 m g t o k g n- (vto-t/tn l a iuTr^x \vw{Pr 6E (- e,r IA' w1^ r tl J k D*'t r # n_ eY(6 YOU MUST SHOW ALL WORK TO RECEIVE FULL CREDIT 1. (2 pts) Give the chemical symbol or name for each of the following elements: Br Eilicon Na QgoUNoO S i SoDtutL 2. (2 pts) In an attempt to characterize a substance, a chemist makes the following observations: The substance is a silvery white, lustrous metal. UIISVnC tpl It melts at 6490C and boils at 11050C. Pl,4 t,lstctt- t/+ Label the property as either a physical property or chemical property. 3. (9 pts) Convert the following measurements Ifu ttA D.obtrL F lu tob,wL lASnL U r bvo'.p(- 4. (3 pts) Round the following numbers to three significant figures. Use scientific notation if the answer as rounded is ambiguous. s.Bo46 5,bo o.o7os4 1.asptc"L 3oo.s1 3,ol tr{D
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5. (9 pts) Perform the following calculations and express the answer to the correct number of significant figures. 7.65+1.0M+3.0= lI.1 ?flf v 4. (5 pts) Calculate the number of grams of sulfuric acid in 0.500 L of aqueous ::il:i[:::: JH"'J.ytion has a densitv or 1 28 s/mL and is 38'1o/o 7 n {ilo D,sc;oLq y @L x Lz'+ .2 bi,o+#E LJ X17 >'*tat- L g1 A kzitz Mt(-' U rtc t P 811 x (46.3 - 3s.r; = 'l'a| Yff 't b\r:'u%^, x ?i?,'Til+r = z'ttl h*,ft(tL t v lVrD ta,t6q tm U *ct12 0.021 x74T= tl, 1l QIA
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Dr.Loza Name 3 p L t o m L Chemistry 121 Fall 2008 Quiz 1 Rec.lnstr.
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