Exam I Key - / NAME: WlKRENT CHEM 151lN FALL 2009 EXAMI 1....

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Unformatted text preview: / NAME: WlKRENT CHEM 151lN FALL 2009 EXAMI 1. Determine the volume in liters of ethanol that contains 1.5 Kg of ethanol? Density of ethanol = 0.79g/ml. IOOOg = 1 Kg and 1000m| = 1L 1.9451 1000 : 15730.3 ltg K : lgclgyflfimfi (5pts) ll.‘li_l lgTX) 2. A box of salt contains 737g of NaCl. How many moles of NaCl are present in the box? (Spts) M1;- : lQuLe We Natl Natl >< Sgfl-lils 3. Calculate the molar mass of Salicylic acid, C7H503. (Spts) WC 84.07 (0;: Fl (you: 5 x0 VL'IKOO {3%.1’5 NHL? 4. How many molecules are in 46.5g of Salicylic Acid? (lOpts) Avogadro’s Number: 6.02 x 1023 qblgflx lg‘zJ; a 5. How many Hydrogen atoms are in 46.5g of Salicylic Acid? (5pts) 24 2% ‘ . [a alums = liaaxlb M 20am Mmflflw . PM at: Wag... W lmfluvb Saqu H 6‘ In the reaction of iron and sulfur, how many moles of sulfur are needed to react with 60 moles of iron? (Spts) 2Fe(s) +35(s)-) Fe153(s) 7. How many grams of’iron(|||) Sulfide would be produced from a reaction with 405.2g of Fe with excess Sulfur?(5pts) . thFZLSS X 3017'753‘G283 : 7555599ng 2MB 1W“ 9135 Lia‘s/.aflrex W199; 2: .8 N §§ Sale biogzg oi'fe. fi—j 8. How many grams of Iron(ll|) Sulfide would be produced from a reaction with 30.5g of Fe and 30.5g ofSulfur? (5pts) "WE * (W Elsi?“ 307'7359233 = 5m a Peas; 306’ - ~ 5 Fax 53%ng 2mm; hue: R33} 50653; I‘U’Qes x [Kai—€293 1 2m; : (96“? a gas; F’Efih‘es m limfilnjagwfinxflr 510:7j E2 3; ngflw 9. Acetylene and Oxygen gas are the components in a Oxy/Acetylene torch used for welding; the following reaction is the combustion reaction for acetylene: 2C2H2(g) +502(g) -) 4C02(g) + ZHZO (3) Determine the mass of Carbon Dioxide are produced when 54.6g of acetylene are burned? (Spts) . . JWC H’ ‘iuflo (o Wotficoz A fl 5410 CH x Z 2’<—-——-L>‘ ; :IELliS‘s 5 Z 2 2%ng CzH), Q'WQQCLHZ I CD; CD fi 1 10. On a spaceship , LiOH is used to absorb exhaled COzfrom breathing air. LiOHls) + C02(g) '9 LiHC03(s) What is the percent yield ofthe reaction if 50.0g of LiOH produces only 72.8g of LiHCOa? (10pts) . (Meg u r L2H L97. L‘l—i 1.? Cl flfibioflrfimx “9‘2 ‘Osx_~f‘es_'®2ci4 7 asas’a Lia-t indication Mob mac; U . (Os Tilmalxcag VIEW: [415 LiMCD3 11‘ Carbon monoxide and hydrogen gas react to form methanol, CH30H. CO(g) + ZHzlg) 9CH30H(|) If 48.0g of CO and 10.0g of H2 react, how many grams of methanol can be pr/qdu_ced?,(10p,tsfl),r Immox ‘W’W x WW {5% 1,3.Wf’1’321L/ , .n 3C ‘HZX iWHlXMmX 1. $‘ n.w._,-,,._~.w.w._; J/ r1 0 F: \00 ‘omflmlepfl Wad” “"32 “"93 57” 3 ‘ W Gad/290 1” f‘M / _ a? a ‘4 12. Balance the following reactions: (10pts) 3* CH4(g) gaze) -) tong) game) & Nagpollaq) fiMgcuaq) 9Mg3lP04)2(Sl +éNacuaq) 13. Write the chemical formula for the following ionic compounds: (lopts) “61+ .— pr 3. Magnesium Fluoride flgf'z 1-" O?” b. calcium Oxide r (a 0 (a 3+ « - » H. U . c. lron (lll)Ch|oride V' fir” - d. Potassium Bromide K gr 3? My" (0 e. Aluminum Nitride AIA/ 14. When silicon dioxide (sand) and carbon are heated, the ceramic material silicon carbide (Sic) and carbon monoxide are produced. How many grams of SiC are formed from 20.0g ofSiOZ and 50.0g of C? (lopts) 90.0 6720 5:045) +3 C(s) —)5iC(s) + 2C0(g) S70 x («99370 M399 :1 ,3 32c. aflOggozxm‘i Z l 5 0x lprQS‘tC M 3902 ~29 u 2 W09: lmbfi‘lcszu: 557147880 ...
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Exam I Key - / NAME: WlKRENT CHEM 151lN FALL 2009 EXAMI 1....

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