Revised Practice exam 1 2008

Revised Practice exam 1 2008 - V Chemistry 142A Seat (1)...

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Unformatted text preview: V Chemistry 142A Seat (1) Name ’ Spring Quarter, 2008 —- EXAM #1 ' Lab/Quiz Section (1) April 25, 2008 VERSION A Lab/Quiz TA - ’ ' (l) l. (8) Give the correct chemical name or chemical formula for each of the following Chemical compounds: (a) San TAQ W} (b) Calcium Nitu'de ' Cafihlz. (c) KOH Eel-3m 55mm- Ext) @1900 (d) Lithium VIodite’ Li 10’5- ' l (e) KH803 Dig fink/tin Hgémgg ' 5144(le (t) AmmOnium Dichromate (N Hg’lz (f 3320; I .(g) H2804 smfl‘g ’ (lo: p- (h) Tn'nitrogen Pentoxide ' I Q) ~ 2. (10) Short Answer Questions 4 i 2_ p x ’ s1, -‘ 303 go; ' Answer' P0513- ' . I (c) The elements calcium and barium belong to which family or group of I 1 ts? e emen Answer Kai-(44 f,ka - 9 ’2. . (d)' What would be the approximate molar mass of deleu‘gtggr‘llefli e (CD4)? 0 = 2 - 0N 5M9 (e) What is the molar mass of molecular sm‘ S 8, 1 Answer. 3 K87 . . a a l V Chem 142A — SEr. Qtr., 2008 —— Exam #1 Page 2 3. (24) Complete and balance the following chemical and nuclear equations. Indicate the phases of the products in the Chemical equations (5, l, g, aq). If no reaction occurs write N.R. (no reaction); ' (a)_i_Ca<s)+_2Hzoa) —> Comma (MD (b) :38r —>%_ (c)_j_.C5H1%(l)+AOZZ 5 CO 21333:. “[10 ' (a) 2.35m o'n—jlkré \ (e) l (v “LL ‘3) +3o'n+ Energy 302(g) + H200) " .(t) '::Dy ay/ +Energy - (g) _A_ Ba(0H>2<aq) + .j; HBr<aq) '—> Hi0 m BaBr 2 v (h) ‘SZPm—>B*/+4+____ (i)_9:_Sc(s)+_3_012(g)Z a SCCQQ) C ) - ‘E‘ U)_\_K(s)+' \ 02<g)—+ K09. (Bf) 0“ ¥ 5 (k) Ar(g)+ F2(g)—+ 2 K 2- * “102 N-\2 new . _ 5 '(I)_Q‘Zr(s)+ ! N2(g)~+2err~l(5)" 3k VERSION A I (mi) Chem 142A — s r. Qtr., 2008 —' Exam #1 4. (9) " Calculate the number of atoms of each element in 0.0185 nanograms of sodium . '\ t . dxcirgge _ Q, Haggai-— .o\3:€x(a-q3' x7 0 (é) . V L ‘ Na= filmy/0 Cr= ail/(0’0 0_= Qflfixza‘ 5. (9) What is the percentage compesition of 3.50 g of ammoniumcarbonate? b S _,,/’ J V3: ' “QWOLCOE ‘ haw : ‘1 9.0 Q film/J) : L 7, H4: 8 U 4170’» y(0() ‘/‘C: F004 X100 / O : “W5 190 40.01 _ %N= 10H ,%H= $33 ',%'C= 32 5 ,%0= 90/4 \L {0. 0 '/ . VERSION A Chem 142A — Sgt. om, 2008 — Exam #1 V V ’ V Page 4 .6. (10) Calculate the mass of heEtane (C7H16) burned in an excess of oxygen if 37.5 g of C02 were produced? 3155 Coin“ W Cmbow Paymth J/ C023‘Nglwme, ‘ l W801? (12752 M3845 C 'afllfl’m' 67H”. Ht 4 ._ \L'gsy7A/CCS 7 \MaQLS C lea make l (74“, .\22- meats 01H”! Lem“) C?Hlb 3 \oaac‘ggome “27- Y we,“ 2 . 34‘“ PM ‘17. v 7. (9) Calculate thenuelear binding energy per nucleon for '60Gd whose _ mass = 159927050 amu. VERSION A ( Chem 142A -' er. Qtr., 2008 —- Exam #1 - " . - Page 5 8. (9) 1 Calculate the empirical and molecular formulas of a comgound containing C, H and 0 if its molecular mass is approximately 150 g/mi" 3mbustion of 7.36 g of the compound in anexcess- of oxygen yielded 13.3 g of C02 and 4.54 g of ‘/-C =\3135C02(t2?233 3 WALL ‘1’ ’ '739 H / Mt 420W”) : awe/7% : “my \or “M. 2 we; : k16,4137ch Wits CW“ “(9J5 245W“ 3-43 MM 1 M092 ' .. 170 - . CUJW'* 5 60 (Cal-isol)x5 7: Cause. ’1 ’ ' ‘”‘ t ' C? “t 5 0 . Empirical Formula = Molecular Formula = m .t — 9, (9) Calculate the mass Wacrylkninile (C3H3N) that could be prouhu' ‘ “'5’ ‘ ‘ ' reaction of 0.85kg of propylene (C3'H5), 1.30 kg of ammonia, and 1.60 kg of oxygen bythe equation below. ‘ 000 a ‘1 \ kg” - - 2C3H6(g) + 2NH3(g) + 302(g) "’ 2C3H3N(g) + 6H20(g) MVJ 1&5!pr ‘7 R club 3’ “"5 v 8503, Woo U000 20.21 116:5 @343 limit 100. magi-5 Cgub WA! «St. 3.6.1 Mate! W“? 'cm Q - . Bub 9mm: .3, gm MM \1 436/0 30 W215 63). C 3 H39) \L S a .10. (5‘ Bonus Points) _ \ \ 0'10 6 C3 um] The Roman name for the element sodium is natrium and was used to W 9 g1ve the symbol Na. What is the modem name for element 11? _ ' Mswerflme VERSION A W404. (VA mil—.4) ...
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This note was uploaded on 03/22/2011 for the course CHEM 142 taught by Professor Zoller,williamh during the Spring '07 term at University of Washington.

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Revised Practice exam 1 2008 - V Chemistry 142A Seat (1)...

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