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HW1_Soln - Chemistry 207 Assignment 1 Due Friday September...

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Unformatted text preview: Chemistry 207 Assignment 1 Due: Friday, September 7 @2:00pm Name «a 2 Lab TA Lab DayfTime Practice Problems from Chapter 2: 5 ,11, 19, 25, 29,43, 53,57, 59, 70, 86 1. A gas of C12 molecules is analyzed in a mass spectrometer, as illustrated in Fig. 2.14, and the following masses (a) Use this information to identify the isotopes of chlorine, and give their mass numbers and masses. (b) Use this information to calculate the atomic mass of chlorine, as reported, for example, in a periodic table. Hint: If the chance of rolling a die and getting a 4 is 1/6, the chance of rolling two dice and getting two 43 is 1/36. (an 3 mdeuflnr Mun?) "st-ms Q a¥Msc messes / M, (H11 AAA 2 hugs #S/ Q‘CQ1_ Q'Cl “AIQ‘ .3 fiLCI ..—- ntc' ) A‘ClAn-LC-l Mi = 1/1MCA'Q" (MC—id = C°\-°|3'-}3u/L =\3“l.‘lL‘3‘lul :7 pg! 235‘ ML = ‘AMCMCI- “1cm 2 Mauser/t 21W :3 9.539: (aha-J“ MI+MZ -: News 1/ ('3\ {Tulsa-id «Lu-«Ann. at 351.11“ \J‘l'tWHMJ “induce 'l' ”(l—.370 2 ,O-S-i-‘u '-" 0.4399‘ LPN-“Md «Lulu-u; at. 14 Li 1 \JOJDS'XCL = [OJ—HZLS MC, : oasestzsmsam + e.1:t11.('5t.¢1ar1 a) 2 bat—ts at ‘ agree; wiMn “my-1.9. Lwer cl“ Pumice. 2. A 50 mg sample of a dental cement, composed of a single chemical compound, contains 16.58 mg oxygen, 8.02 mg phosphorous, and 25 .40 mg zinc. The formula weight of this compound is between 250 and 400 glmol. Determine the formula of this compound. Mil 13'6‘} It.“ alnu Mel .2“ ‘2 0.915%6 _-~\C$, 00¢ .3333 cam MM (“wild ('3 GDI'Hxl t. I 2 n P O —‘3 2“1-" P‘ O .3 Luna“ 15'1“?“ ““"H’ 4 Quad“ Vina-u OY‘DW “'3 ighg €1.03? 5 I "‘ Wasted +1L’1oflfl-W +¥il¢t°°\ 2 NHL 3nd" Molar MAS} ;.\r inirl(a\ garmvde -— “—---—-—-» SVACL ZKFSB’L] 3 HG‘O J (‘fif‘mhix '2 {hp 51". C..\ Brmwla {-3 2‘43 9L 03 l 3. A metal M forms an oxide named X. X has empirical formula M02, and is 13.38 mass per cent oxygen. When heated, X gives off oxygen and converts to Y, which is 9.334 mass per cent oxygen. (a) What is the identity of metal M? (b) What is the empirical formula of COlTlpOUnd Y? (C) M: Unknown Ma\'\/ Mu: 6i- M. 2Cl4.0‘0\ ‘: \3-13 : 0‘13]? ZULG‘Q +M 1“ I CLtCLLL flirt-mitt; gk.r} { M 7 (EM\ : \ZOQCZ Mo‘s“ ‘ ‘ o.l338’ ‘3 Mus IVE}, (5.} me‘nrfigd GNMJa 01* \l/ 5.5 ‘91: 0.0 7 = W‘ 1 1-333 P5631333 fer—EEK— (lm—e‘) Cl - 0- ° 131”“ 4. A widely prescribed allergy medication is entirely composed of C, H, C1, N, and O, and is 54.62 mass % C, 589 mass % H, 23 .02 mass %.Cl, and 6.07 mass % N. Its molar mass is less than 600 g/mol. How many molecules of this medication are contained in a standard dose of 10.0 mg? Causal“- lcm «a MA '. mg C. : 9%.615 :lH.r5'm\} ILOlal-«al ml H = 573‘ :\S.3\1M‘l! mat Cl .~ 13.01 -;\<>.th°1 Mo’l Loos SS‘HY PM] W "-' fag—A"? = [0.w33ma1\ Moi o "2 1W- an o —- 1. “to \S‘n‘t‘v-l Mar €M¢3r§cJ [car a r C .. H \k ‘4qu Hg)?” MOM-33 Omar»; C‘konl‘l‘t ._-.7 (WT Ht” N1 0”“ mam. —=:> iCu H1301 0303! “Natal!“ MAS) at 1”.»ng Erhdla = Ztfl’t‘ofl ltvrliJ-n‘sjirLllmon +3ltr.ct1m ~l ELZS‘HS‘D :lq 4.1.3} :3 MA“! lag: Mgqu‘ MAS; alv- mdewia C (GOV ‘ahu\"‘/ \Mo‘tqr‘ MESS ‘2 Utfllfl} , had-J <. .55 - l‘l \&5 (L. O 1. ”Pilot; Nfievduw 2. 1.30 X50 Mdflw‘h’ . .| Me ,_.. L’ICIJ‘} 0M1 ‘ L+15 gYfilTL’l ...
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