Consider the reaction

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Reference no: EM13897965

The answer are provided. I'm just having trouble with rate law and rate constant, especially question 3.

QUESTION 1: Consider the reaction:   

2NO(g) + O2(g) ?2NO2(g) 

If the instantaneous rate of reaction of nitric oxide (NO) is  -0.016 M/s, at what rate is molecular oxygen reacting 

A) 0.016 M/s  B) 0.032 M/s  C) 0.008 M/s  D)    +0.016 M/s   E)  +0.032 M/s 

 

QUESTION 2: 222Ra is a naturally occurring radioisotope that can  build up in homes. Calculate the rate constant for the  first-order decay of 222Ra. ( t1/2 = 3.30 x 105 s)  A)  2.29 x 105 s-1  B)  2.1 x 10-6 s-1  C)  12.7 s-1  D)  3.03 x 10-6 s-1  E)  4.37 x 10-6 s-1

 

QUESTION 3:  The reaction of NO2 and CO to produce NO and  CO2 is known to occur through a two-step mechanism: 

                                       k1 

Step 1:   NO2  + NO2 ?  NO + NO3                                                

                                       k2 

Step 2:   NO3 + CO ?  NO2  + CO2            

Rate = k[NO2]2   In the overall reaction the coefficient for NO2  is   ___ and  the rate determining step is___.                                      

A)    1 ;   Step 1  B)    2 ;   Step 1  C)    1 ;   Step 2  D)    2 ;   Step 2  E)    1 ;  rds Cannot be determined

Reference no: EM13897965

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