Fall_2002_Midterm_Solutions

Fall_2002_Midterm_Solutions - PRINT NAME: Page L" n?...

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Unformatted text preview: PRINT NAME: Page L" n? (S In each 01' [kc MGL’HPLE CHOICE. [4 points each} Citric. (In: has! msgxmsc questims numbcmd ! témwugh 'i I. All alums of :1 given clement lune ‘he same WWW a, mass @ number of prawns: c. fiumbcr 01' nczlzruns d. number ofclcuwm and mmtmns LR dcmity 1‘ Which smnpiu commas 1h: must atoms? 6) 0m moic of copper ill} chlan‘dc Ex (311:: gram ui‘Eiihium meta! r. “N30 malty!qu ui' Unfit, d. 1 cm ‘ ahhc nit an mi}: mm c. i cm' nfiiquid water 3 (‘ircit 83¢ mamrialig} chm yam wouki not capch it) be 12mm; an 131:: earth's surface. 6) dimwssimn oxide 69 Nah” O barium :rifiuoridc {i l A {3(5) @ [IL-1312;; Page 3 9f 6 PRINT NAM£:W‘_ 4. Which specks will not dissolve in water? :1. NaCl (:9 c. lidean peroxide d. Ammonium chloride cA (MON 5. When 3 meta! and a nonmetal macL :he m {ends in iesc demons and the M tends to gain electron a. mated. mew b4 nonmclaL fianmcui GD meml. mammal d. mannwml. meta! c. mane nf’ these. these elements share dawns equally 6‘ Elcmcm X has thvee natmily occurring isNopca Tim mass {mm} and % abumlance orthe imiopcs are: 37.919 (5.07%). 3933!? (15.35%), and 42‘! i l {79.53%}. What is the 7 average atomic 1711133131311!) of dawn X? G) we W b. 39.68 (37_q‘q\('05.07)+ 3% m7(01|533‘> 4 ‘19.!” {0. 7%?) a, 33.64 1.61 91+ 54301 #3; Sta. : LUan 33.33 I e 39.07 F Page I! offi PRINT NAME; 7. [4 paints] Provide Ihe name or formuh for the finllnwiflg wnpounds and indicate, whemcr the amnqu is mokcuiar or ionic. 3. {6 points; Fili in {he blank Ssénbol ffifiBa ., . {icy WW- .., 1r . 5:3 6 5A A; ; x 32 .- DTG‘ORS r m G ncdfrons W i ' 69 " :[ciééimns I q i 48 N m‘cmém ‘ 2+7 W. 3‘ a m . “bl L..____-. ,. “um—M..." ._._ .< m _ Page 5 ofé mmmm: m 9. as points} {30112 has. a densny of $9.3 g1em’. n‘l wished m can: the mp ofa box the! was 24 cm by Hi cm with Au than was {110 mm mickhow mum gold wwld i need (in grams)? WW (2%,. Av)(ljfimb4d)(0' '0“ Av) ( [cm/4v 10M A“ 3C 4. 3 cm" A“ JAV f’agc 6 ml 6 PRINT NAMEL__ 10. [8 points| One ( I .0} moles ofdihydregcn gas was with !.0 males 91‘ solid baron (B; to form 8 gm mummy mailed "diboranc", The atficial chemical name for “diam-am“ is dibomnhexahydridc. {a} Writc the balanced mania! reaction far :his prongs: '3“ *QB -‘ 8H 30) 5) “(9) {b} Whit: is the timiling reagenl? NM) 3m] H‘L Fina/w}: 8/ .' H} CUMVAIJ'} I— »Jllxflve. 8 leaf-Hug!) {c} thn the reaction is uumpicled. haw many 10ml moles ofgas are prewar? WW Wm H; Mm 1w. 0-: 6J1; ’2 Myrrh-J B is a JolrJ 0 no Ha_ :1 IQH‘ dUpf 1‘ O f .L w M“): oinJ ...
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This note was uploaded on 02/20/2012 for the course CHEM 101 taught by Professor Any during the Fall '08 term at Northwestern.

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Fall_2002_Midterm_Solutions - PRINT NAME: Page L" n?...

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