REACTIONS 1 When the following equation C9H15S O2 CO2 H2O SO2 is balanced with the smallest possible set of integer coefficients no fractions the coefficient preceding CO2 is A B C D E 2 When the equation for the complete combustion of ethanol C2H5OH to form CO2 and H2O is balanced with lowest integer coefficients the coefficient for O2 is A B C D E 3 73 amu 150 amu 216 amu 290 amu 370 amu 4 31 g of a hydrocarbon is completely combusted in oxygen and found to yield 6 36 g of water The empirical formula for the hydrocarbon is A B C D E 5 7 6 5 3 None of the above answers is correct A 100 0 g sample of a metal M is burned in air to produce 103 7 g of its oxide with the formula M2O What is the atomic mass of the metal A B C D E 4 9 27 36 18 None of the above is correct C3H7 CH4 C7H4 C21H4 CH 1 00 g of a compound is combusted in oxygen and found to give 3 14 g of CO2 and 1 29 g of H2O From these data we can tell that A the compound contains C H and some other element of unknown identity so we can t calculate the empirical formula B the compound contains only C and H and has the empirical formula of C6H C the compound contains C H and O and has the empirical formula of CH3O D the compound contains only C and H and has the empirical formula of CH2 E None of the above is a true statement REACTIONS continued 6 Mixing solutions of K2SO4 aq and BaCl2 aq produces an insoluble salt Which of the following is the correct list of spectator ions for this reaction A B C D E 7 K SO42 Ba2 Cl K SO42 K Cl Ba2 Cl Ba2 SO42 When aqueous solutions of Fe2 SO4 3 aq and Pb NO3 2 aq are mixed an insoluble salt forms Which of the following reactions is the correct net ionic equation that describes this reaction A 2Fe 3 aq 3SO42 aq 3Pb2 aq 6NO3 aq 2Fe NO3 3 s 3Pb2 aq 3SO42 aq B Fe 3 aq SO42 aq Pb2 aq 3NO3 aq Fe NO3 3 s PbSO4 s C Fe 3 aq 3NO3 aq Fe NO3 3 s D Pb2 aq 2NO3 aq Pb NO3 2 s E Pb2 aq SO42 aq PbSO4 s 8 Which of these reactions will form a precipitate in water A Mg OH 2 2 HCl Mg Cl 2 2H2O B Mg OH 2 NH4 2SO4 MgSO4 2 NH3 2 H2O C CaCO3 2 HCl CaCl2 CO2 H2O D HCl CH3COOK CH3COOH KCl E Ba NO3 2 K2SO4 BaSO4 2 KNO3 9 Which one of the following unbalanced equations describes a spontaneous reaction A Ag s HCl aq AgCl s H2 g B Hg l Al3 aq Hg2 aq Al s C Cu2 aq Zn s Cu s Zn2 aq D Ni s H2O l Ni OH 2 s H2 g E None of the above describes a spontaneous reaction 10 Which of the following reactions are redox reactions A B C D E 1 Ni OH 2 s H2SO4 aq NiSO4 aq 2 H2O l 2 8 NH3 g 6 NO2 g 7 N2 g 12 H2O l 3 3 PbO s 2 NH3 aq N2 g 3 H2O l 3 Pb s 1 only 2 only 3 only 1 and 3 2 and 3 REACTIONS continued 11 The oxidation number of Mo molybdenum in Mo7O246 is A B C D E 6 5 4 3 2 12 100 0 mL of Ca OH 2 solution is titrated with 5 00 10 2 M HBr It requires 36 5 mL of the acid solution for neutralization The concentration of the Ca OH 2 solution is A B C D E 9 12 10 3 M 1 82 10 4 M 9 12 10 4 M 1 82 10 3 M None of the above is within 1 of the correct answer 13 Given the balanced equation for the oxidation of ethanol C2H5OH by potassium dichromate 3C2H5OH 2K2Cr2O7 16HCl 3C2H4O2 4CrCl3 4KCl 11H2O Calculate the volume of a 0 600 M K2Cr2O7 solution needed to generate 0 1665 moles of C2H4O2 from a solution containing excess ethanol and HCl A B C D E 278 mL 185 mL 111 mL 6 60 mL None of the above answers is correct 14 How many grams of solid NaOH will be needed to neutralize 85 0 mL of a 0 275 M solution of H2SO4 A B C D E 0 94 g 19 1 g 1 87 g 0 47 g 6 41 g 15 When 47 3 mL of 0 107 M HCl is added to 54 7 mL of 0 213 M NaOH the resulting OH concentration is A B C D E 0 028 M 0 065 M 0 114 M 0 120 M 0 213 M REACTIONS continued 16 A method of removing CO2 g from a spacecraft is to allow it to react with solid NaOH 2 NaOH s CO2 g Na2CO3 s H2O l How many liters of CO2 g at 26 0 C and 755 mm Hg can be removed per kg NaOH A B C D E 24 7 16 3 12400 618 309 17 A gaseous sample of pure methane CH4 is found to occupy a volume of 20 0 L at 25 C and 1 atm pressure What volume of O2 at the same temperature and pressure should be just sufficient to permit complete combustion of the methane A B C D E 10 0 L 20 0 L 30 0 L 40 0 L None of the above is correct 18 The following reactions involve only gases Which of them if carried out in a closed container at constant temperature would proceed with a decrease in pressure A B C D E 2 CO O2 2 CO2 2 NH3 N2 3 H2 N2 O2 2 NO 2 O3 3 O2 2 HI H2 I2 19 Which of the following compounds would react most rapidly with bromine Br2 at room temperature a pentane CH3 CH2 CH2 CH2 CH3 b toluene CH3 c ethanol CH3 CH2 OH d cyclopentane e 2 hexene CH3 CH2 CH2 CH CH CH3 REACTIONS continued 20 Choose the appropriate words to fill in the blanks A condensation reaction between a and a will form an A amide ester alcohol B amine carboxylic acid amide C alcohol amine amide D alcohol alcohol ester E alcohol carboxylic acid amide 21 Below is a segment of a polymer formed via an addition reaction Which one of the following is the monomer that was used to form this polymer H C H3 H C H3 H C H3 H C H3 C C C C C C C C H H H H H H H H A B H H C C H CH3 H C H H C C CH3 D CH3 H C C C …
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