C3HW2 5th - C3HW2P Started 2:35 PM Submitted 4:15 PM Time...

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Unformatted text preview: C3HW2P Started: September 26, 2010 2:35 PM Submitted: September 26, 2010 4:15 PM Time spent: 01:40:35 Total Quote: 6,12 : 50% when 1.[) mol of Fe reacts with Cl2 forming Fecla, how many moles of Cl2 are required to react with all of the iron? 1. 0.7 mol 2. 1.0 mol B 3. 1.5 mol 100% a 4. none of these 5. 0.3 mol Score: 1/1 2. In the following reaction, how many moles of the non-l itjng reactant are in excess if 441ml!“ are combined with 2 71ml HEN 211(5) + HCl (3) a A103 (1;) + 1—12th not balanced) A. 1.23 B. 3.95 C. 1.70 D. 3.73 B E. 3.50 100% a Score: 1/1 3. when hydrogen sulfide gas is bubbled into a solution of sodium hydroxide. the reac ' forms sodium sulfide and water. How many grams of sodium sulfide are formed if 10.35 g of hydrogen sulfide are bubbled into a soluhon contain g 49.91 g of sodium hydroxide, assuming the li ng reagent LE completely consumed? {Exampie answer: 12.3) Do not enter units with your answer. Answer: 24.3 100% 24.34 General Feedback: Which reagent Is the limiting one? Remember, that decision Is based on the balanced equation and moles of each reactant. Score: 1/1 4. 1n the reaction of N2 and H2 to produce NH3, how many moles of N2 will produce 33.3 moles NH3? Answer: 19.2 100% 19.1 Scote: 1/1 5. Aluni'nm and oxygen Ieact acconilg lo lhe folowilg equalion: 4A1(s)+ 302(5) a “1203(5) In a ceilai] experiIIenl, 4.6 9 Al was Ieacted wilh excess oxygen. If lhe ptoduct was obtahed i1 64% yield, how many gains wete obtahed? A. 2.9 B. 1.5 C. 8.7 B D. 5.6 100% a E. 65 Scote: 1/1 6. What E lhe lheotelical yield oi mm when 334- g oi Bizfl3 leacls wilh exceas carbon as shown below? nizoa + C(s) => Bi(5) + com) (not balanced) All“: 300 100% 300 Scote: 1/1 7. Household bleach E an aqueous solulion ofsociLllI hypochlorite. What E lhe lnolarity of a bleach solulion Ihat contails 30.4 g socillll hypochlorite il a total volume of 375 ml? Answel': .662 0% 1.09 Scote: 0/1 8. Concenttated sllfuic acid (18.3 M) has a density of 1.34 g/IIIL. What E lhe mag ‘36 ofH2504 iI lhe solulion? A. 97.5% a B. 93.6% B c. 9.3% 0% D. 34.3% E. 33.0% E? ole: D/l what volume of watel mist be added to 45.0 Ill of a 1.0 M solution of H 4 il older to cleate a 0.33 M H254)4 solulion? A. 137 Ill B. 14.9 Ill C. 33.] Ill 30.100": 0% E. 91.4 nl I #9 ate: 0/1 1.. How many gains of NaHZPO4 ale needed to [eacl completely wilh 29.0 ml. of 0.339 M NaOH'? NaHZPO4(s) + ZNaOH(aq) => Na3P04(aq) + 2H20(n Answer: 12 0% 0.59 5‘? ole: 0/1 11. A 10.00-Ill sample of 0.254 M H2504 '5 Iillated wifll 0.385 M "30". What vollllle of Ihe N30" solufioll, il Ill, '5 qulied? A. 6.60 B. 30.3 a c. 15.1 0% D. 10.0 E. 13.2 a Scale: Oil 1 2. How many gains of NaHZPO4 ale needed to leact completely wifll 57.48 ml of 0.225 M "30"? file molal mass of NaHZIN)4 E 119.98 glmol. Equalion: NaHZPO4(5) + ZNaOH(aq) :> NaSPO4(aq) + anion) A. 33.34) g B. 0.776 g I a C. 0.308 0% lncollect: 0.00646 mol of "a" PO ale needed. 9 2 4 D. 7.766 g E. 0.194 g Scale: 0/1 ...
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