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Practice problems _Chapter 13 and 14

Practice problems _Chapter 13 and 14 - Practice Problems...

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Practice Problems Chapter 13 and 14 Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Nitrogen monoxide reacts with bromine at elevated temperatures according to the equation. 2 NO( g ) + Br 2 ( g ) ± 2 NOBr( g ) In a certain reaction mixture the rate of formation of NOBr( g ) was found to be 4.50 x 10 -4 mol L -1 s -1 . What is the rate of consumption of Br 2 ( g )? 1) A) 2.25 x 10 -4 mol L -1 s -1 B) 9.00 x 10 -4 mol L -1 s -1 C) 2.12 x 10 -4 mol L -1 s -1 D) 2.03 x 10 -3 mol L -1 s -1 2) The rate of a chemical reaction in solution can be measured in the units 2) A) mol L -1 s -1 B) L 2 mol -1 s -1 C) mol s L -1 D) s -2 3) A reaction has the rate law, rate = k[A][B] 2 . Which change will cause the greatest increase in the reaction rate? 3) A) tripling the concentration of B B) doubling the concentration of A C) decreasing the temperature without changing the concentrations D) doubling the concentration of B 4) The reaction, 2 NO( g ) + O 2 ( g ) ± 2 NO 2 ( g ), was found to be first order in each of the two reactants and second order overall. The rate law is therefore 4) A) rate = k[NO][O 2 ] B) rate = k[NO 2 ] 2 [NO] -2 [O 2 ] -1/2 C) rate = k[NO] 2 [O 2 ] 2 D) rate = k([NO][O 2 ]) 2 5) A reaction has the rate law, rate = k[A][B] 2 . What is the overall order of the reaction? 5) A) 3rd B) 1st C) 4th D) 2nd 1

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6) For the reaction, 2 XO + O 2 ± 2 XO 2 , data obtained from measurement of the initial rate of reaction at varying concentrations are given below. Experiment [XO] [O 2 ] Rate (mmol L -1 s -1 ) 1 0.010 0.010 2.5 2 0.010 0.020 5.0 3 0.013 0.020 45.0 The rate law is therefore 6) A) rate = k[XO] 2 [O 2 ] B) rate = k[XO] 2 /[O 2 ] 2 C) rate = k[XO] 2 [O 2 ] 2 D) rate = k[XO][O 2 ] 7) For the reaction, 2 M + 2 N ± 2 P + Q, studies on how the initial rate of the reaction varied with concentration were carried out. Some data is given below. Experiment [XO] [O 2 ] Rate (mmol L -1 s -1 ) 1 0.100 0.100 0.000230 2 0.100 0.200 0.000920 3 0.200 0.200 0.000920 7) A) the rate law is therefore: rate = k[N] 2 B) the rate law is therefore: rate = k[M][N] 2 C) the rate law is therefore: rate = k[M][N] D) the rate law is therefore: rate = k[M] 2 8) Given the reaction, aA + bB ± dD + eE If we try rate = k[A] q [B] r for a generic rate law statement, which one of the statements below is false ? 8)
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Practice problems _Chapter 13 and 14 - Practice Problems...

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