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In a chemical reaction, X reacts to produce Y:   3X → 2Y The concentrations of X and Y are measured with time: t/s:      0.00      1.00     2.00      4.00      8.00      16.0 X/M:  1.000    0.705   0.526    0.352    0.264    0.250 Y/M:  0.000    0.197   0.316    0.432    0.491    0.500   The concentration of reactant X varies with time:         X = (X0 – XF) e–kt + XF The concentration of product Y varies with time: Y = (YF – Y0) (1 – e–kt) What is the rate constant k for the reaction?   Question 18 options:   k = 0.33   k = 0.25   k = 0.50 What is amount of Y produced after 3.00 s?   Question 19 options:   0.375 M   0.388 M   0.362 M At what time does the concentration of X become 0.5 M?   Question 20 options:   2.1 s   2.2 s   2.3 s

In a chemical reaction, X reacts to produce Y:   3X → 2Y The concentrations of X and Y are measured with time: t/s:      0.00      1.00     2.00      4.00      8.00      16.0 X/M:  1.000    0.705   0.526    0.352    0.264    0.250 Y/M:  0.000    0.197   0.316    0.432    0.491    0.500   The concentration of reactant X varies with time:         X = (X0 – XF) e–kt + XF The concentration of product Y varies with time: Y = (YF – Y0) (1 – e–kt) What is the rate constant k for the reaction?   Question 18 options:   k = 0.33   k = 0.25   k = 0.50 What is amount of Y produced after 3.00 s?   Question 19 options:   0.375 M   0.388 M   0.362 M At what time does the concentration of X become 0.5 M?   Question 20 options:   2.1 s   2.2 s   2.3 s

Chemistry: Matter and Change
Chemistry: Matter and Change
1st Edition
ISBN:9780078746376
Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom
Publisher:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom
Chapter16: Reaction Rates
Section: Chapter Questions
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Question

In a chemical reaction, X reacts to produce Y:

  3X → 2Y

The concentrations of X and Y are measured with time:

t/s:      0.00      1.00     2.00      4.00      8.00      16.0

X/M:  1.000    0.705   0.526    0.352    0.264    0.250

Y/M:  0.000    0.197   0.316    0.432    0.491    0.500

 

The concentration of reactant X varies with time:

        X = (X0 – XF) e–kt + XF

The concentration of product Y varies with time:

Y = (YF – Y0) (1 – e–kt)

What is the rate constant k for the reaction?

 

Question 18 options:

 

k = 0.33
 

k = 0.25
 

k = 0.50

What is amount of Y produced after 3.00 s?

 

Question 19 options:

 

0.375 M
 

0.388 M
 

0.362 M

At what time does the concentration of X become 0.5 M?

 

Question 20 options:

 

2.1 s
 

2.2 s
 

2.3 s
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