1. A chemical reaction that is first order in X is observed to have a rate constant of 2.20×10−2s−1. If the initial concentration of X is 2.0 M, what is the concentration of X after 186 s?

Select one:

 a. 0.20 M

 b. 0.033 M

 c. 64 M

 d. 0.59 M

 e. 0.98 M

 

 

2. For the hypothetical reaction 2A+B→2C+D, the initial rate of disappearance of A is 2.0×10−2 mol/(L⋅s). What is the initial rate of disappearance of B?

Select one:

 a. 

1.0×10–2mol/(L⋅s) 

 

 b. 

4.0×10–2 mol/(L⋅s)

 c. 

1.4×10–1 mol/(L⋅s)

 

 d. 

4.0×10–4 mol/(L⋅s) 

 

 e. 

1.4×10–2 mol/(L⋅s)

 

 

3. For the hypothetical reaction 2A+B→2C+D, the initial rate of disappearance of A is 4.0×10−2 mol/(L⋅s). What is the initial rate of disappearance of B?

Select one:

 a. 

2.0×10–2 mol/(L⋅s)

 

 b. 

4.0×10–2 mol/(L⋅s) 

 

 c. 

1.4×10–1 mol/(L⋅s) 

 

 d. 

4.0×10–4 mol/(L⋅s)

 e. 

1.4×10–2 mol/(L⋅s)

 

 

 

 

 

 

4. The oxidation of ammonia produces nitrogen and water via the following reaction:

 

4NH3(g)+3O2(g)→2N2(g)+6H2O(l)4NH3(g)+3O2(g)→2N2(g)+6H2O(l)

 

 

Suppose the rate of formation H2Ois 6.0 mol/(Lâ‹…s). Which of the following statements is true?

Select one:

 a. 

The rate of consumption of NH3 The rate of consumption of NH3 is 4.0 mol/(Lâ‹…s)

 b. 

The rate of consumption of O2 The rate of consumption of O2 is 2.0 mol/(Lâ‹…s)

 c. 

The rate of consumption of N2 The rate of consumption of N2 is 1.3 mol/(Lâ‹…s)

 d. 

The rate of consumption of N2 The rate of consumption of N2 is 6.0 mol/(Lâ‹…s)

 e. 

The rate of consumption of NH3 The rate of consumption of NH3 is 0.50 mol/(Lâ‹…s

 

 

 

5. The rate law for the reaction between chlorine and nitric oxide, 2NO(g)+Cl2(g)→2NOCl(g) is Rate = k[NO]2[Cl2] What effect will doubling the concentration of NO have on the initial rate of the reaction

Select one:

 a. The initial rate will double.

 b. The initial rate in will quadruple.

 c. The initial rate will be squared.

 d. The initial rate will not be affected.

 e. The initial rate will decrease to one half of its original value.

 

 

6. what are the units of k when the unit of time is seconds and the unit of concentration is moles per liter if the rate law for a reaction is Rate =k[ClO3-][I-][H+]

Select one:

 a. ( L⋅s )/mol

 b. mol2/(L2⋅s)

 c. mol/(L⋅s)

 d. L2/(mol2⋅s)

 e. L3/(mol3⋅s)

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Status NEW Posted 19 Jun 2017 02:06 AM My Price 9.00

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