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Q9-answers349 - Quiz 9 Name ii i Chem 1B Spring 10 Fossum...

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Unformatted text preview: Quiz 9 Name: ii i Chem 1B, Spring 10 Fossum 6.022 x 1023 particles/mol F = 96485 C/mole e' 1 A = 1 C/sec 0.693 Rate = th ty = — ln-Z-V—’ = —kt 2 k N0 1 Ci = 3.70 x 1010dps u (“micro-“) means 10'6 1. (6) For each of the following radioactive nuclei, predict the type of radioactive decay it will undergo. Explain your reasoning and write the nuclear equation for the decay. a. 252Es 2 >33 Audios \S Tao LCWEX'l 2. (4) A current of 0.832 A is used to deposit chromium on an object from a solution of Cr3+(aq). What mass of chromium will be deposited in 60.0 minutes? 0.5832 C C(BT «} 3g_-% Cr 86C 3 60 OQSZCXW l Mae ) fl, ____________ W-.. ‘Céfl, (60.0mm ( miehb>(a {sec CitA‘s‘SC. 3M6; (W510- ® [Qt] ll l 3. $1) 358 has a half—life of 88 days. If a sample containing sulfur-35 has an activity of g 3.2 uCi, what mass of sulfur-35 is in this sample? [5 ‘ ’ , ’ «h: 0- 93 : 9.1513 : 7.975x10 QWZQELNL N1: %6‘ 0/2 , Wok (1.034 .. a ’ 5‘ . <3.Z),LC£> l CE > 3301101000? y L (06“ XLO$(/Q‘PS — l IWXIO szchz ( \o‘yfiz l C: c HIM) WW3 Mdfi’? M ’ IO (lard/@5316, <l lg‘l x[O‘-§ math?) ®0$£L> éO MmXZq (M _ [.025 xlO nuc ( 96c: ( ram 1 W (and Adj @ - "bzwolowcw/ l 2% «Io'zwcw 36%? Nth' adj : \ fl§b "’ -3 t A7§§% - 7 (8% A0 am“) 33 W 3&4 x s”? ( \ :2qu XlO‘mmUL‘LL} \l L_fl’:(/QW’__M } ( 36 3 S : 1 54% 240-” \L 67 (59‘ 022 x (Obnuch? l M 75 MO-" 4. A‘ w The half-life of 131I is 8.07 days. How long will it take for the amount of iodine-131 in a sample to decrease to 1.0 % of its original amount? . M %t—- :: v lift (t’é 810700 0 E’s: .LO : (Lalo No [00 .PM (00103 4“: - _ M5 We vv, _o.og§&7 3b 4913 Niggofl WWW l0 I) (W ...
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