Question : 16.1 Multiple Choice 1) Most reactions carried out in liquid solution : 1282444

16.1 Multiple Choice

1) Most reactions are carried out in liquid solution or in the gaseous phase because in such situations ________.

A) activation energies are higher

B) reactant activation energies are lower

C) kinetic energies of reactants are lower

D) reactant collisions occur more frequently

2) For a collision between molecules to result in a reaction, the molecules must possess a favorable orientation relative to each other ________.

A) and exchange electrons

B) and “stick together” for at least 10 seconds

C) and a certain minimum energy

D) and be in the gaseous state

3) Which of the following statements about “activation energy” is correct?

A) Activation energy is low for reactions which take place quickly.

B) Activation energy is the maximum energy a reacting molecule may possess.

C) Activation energy is the energy given off when reactants collide.

D) Activation energy is high for reactions which take place rapidly.

4) The minimum combined kinetic energy reactant particles must possess in order for their collision to result in a reaction is called the ________.

A) dissociation energy

B) activation energy

C) collision energy

D) orientation energy

5) Whether a reaction is exothermic or endothermic is determined by ________.

A) the activation energy

B) the physical state of the reaction system

C) an energy balance between bond breaking and bond forming resulting in a net loss or gain of energy

D) whether a catalyst is present

6) Which reaction below is endothermic?

A) NH3 + hr NH4Br + heat

B) CH4 + N2 + heat hn + NH3

C) 2NO2 N2 + 2O2 + heat

D) PCl3 + Cl2 PCl5 + heat

7) Which of the following changes would most likely decrease the rate of a reaction?

A) increasing the activation energy for the reaction

B) decreasing the activation energy for the reaction

C) increasing the reaction temperature

D) increasing the concentration of a reactant

8) A catalyst works by ________.

A) increasing the rate of a reaction by decreasing the heat of reaction

B) increasing the rate of a reaction by lowering the activation energy of the forward reaction only

C) increasing the rate of a reaction by increasing the activation energy of the reverse reaction only

D) increasing the rate of a reaction by providing an alternative pathway with a lower activation energy

9) Increasing the temperature at which a chemical reaction occurs ________.

A) will lower the activation energy, thus increasing the reaction rate

B) will raise the activation energy, thus decreasing the reaction rate

C) causes more reactant collisions to take place in a given time, thus increasing the reaction rate

D) will cause fewer reactant collisions to take place

10) Catalysts are correctly characterized by each of the following statements except one. The exception is ________.

A) catalysts can be either solids, liquids or gases

B) catalysts lower the activation energy for a reaction

C) catalysts do not “actively” participate in a reaction

D) catalysts are not “consumed” in a reaction

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July 1, 2023

51. Speedy Couriers documented the miles driven and total vehicle costs for the past five months as follows:

Number of miles

Total vehicle costs

January -------------

800

$1,095

February -----------

1,000

1,440

March --------------

750

1,200

April ----------------

900

1,380

May -----------------

1,100

1,410

Refer to the Speedy Couriers information above. Using the high/low method, what is the cost equation to predict total vehicle costs? A. Y = $52.50 + $1.67xB. Y = $255 + $1.05xC. Y = $285 + $1.725xD. Y = $750 + $.60x

52. Speedy Couriers documented the miles driven and total vehicle costs for the past five months as follows:

Number of miles

Total vehicle costs

January -------------

800

$1,095

February -----------

1,000

1,440

March --------------

750

1,200

April ----------------

900

1,380

May -----------------

1,100

1,410

Refer to the Speedy Couriers information above. Using the high/low method, if Speedy expects to drive 1,200 miles in June, what will be expected total vehicle costs? A. $1,470.00B. $1,515.00C. $2,056.50D. $1,720.88

53. Denver Manufacturing would like to do a better job budgeting for maintenance costs and, consequently, they have prepared a schedule showing maintenance costs and units produced for the past five months as follows:

Number of

units produced

Total maintenance costs

January -------------

5,400

$4,800

February -----------

6,600

5,180

March --------------

4,900

4,500

April ----------------

5,600

4,900

May -----------------

6,000

5,490

Refer to the Denver Manufacturing information above. Using the high/low method, what is the cost equation to predict total maintenance costs? A. Y = $90 + $.90xB. Y = $2,540 + $.40xC. Y = $1,646 + $.5824xD. Y = $2.50x - $11,320

54. Denver Manufacturing would like to do a better job budgeting for maintenance costs and, consequently, they have prepared a schedule showing maintenance costs and units produced for the past five months as follows:

Number of

units produced

Total maintenance costs

January -------------

5,400

$4,800

February -----------

6,600

5,180

March --------------

4,900

4,500

April ----------------

5,600

4,900

May -----------------

6,000

5,490

Refer to the Denver Manufacturing information above. Using the high/low method, if Denver expects to produce 5,000 units in June, what will be budgeted total maintenance costs? A. $4,590B. $4,558C. $4,540D. $4,363

55. In decision-making, which of the following kinds of costs should always be taken into account? A. Fixed costsB. Variable costsC. Relevant costsD. Sunk costs

56. In decision-making, which of the following statements is true? A. Variable costs can always be viewed as relevant.B. Fixed costs can always be viewed as not relevant.C. Variable costs may or may not be relevant.D. Fixed costs can always be viewed as relevant.

57. In general, when are variable costs not relevant to a decision? A. When they are avoidable.B. When they do not differ among alternatives.C. When they are part of a mixed cost.D. When they are less than fixed costs.

58. In general, when are fixed costs relevant to a decision? A. When they are part of a mixed cost.B. When the fixed cost per unit changes as production changes.C. When they are avoidable.D. When they have already occurred in the past.

59. Another word for a relevant cost is a(n) ____ cost. A. fixedB. unavoidableC. incrementalD. variable

60. University Memorabilia Inc. is a locally run retail shop. The store usually closes at 5:00 pm, but the owners have inquired about the extra costs involved by letting the store stay open until 9:00 pm. The store manager has listed the following monthly expenditures and their related costs:

Item:

Manager salary

$40,000 per year

Store rent

$5,000 per month

Sales’ associates wages

$9 per hour

Store utilities

$4 per hour

Which of the above cost items would be relevant to the decision about staying open extra hours? A. 1, 2, 3, and 4B. 2, 3, and 4C. 2 and 3D. 3 and 4

July 1, 2023

16.1 Multiple Choice

1) Most reactions are carried out in liquid solution or in the gaseous phase because in such situations ________.

A) activation energies are higher

B) reactant activation energies are lower

C) kinetic energies of reactants are lower

D) reactant collisions occur more frequently

2) For a collision between molecules to result in a reaction, the molecules must possess a favorable orientation relative to each other ________.

A) and exchange electrons

B) and "stick together" for at least 10 seconds

C) and a certain minimum energy

D) and be in the gaseous state

3) Which of the following statements about "activation energy" is correct?