If the initial [NO2] is 0.260 M, it will take s for the concentration to drop to 0.150 M. If the initial is 0.260 , it will take for the concentration to drop to 0.150 . 1.01 5.19 0.299 0.0880 3.34

The question is incomplete, here is the complete question:

At elevated temperature, nitrogen dioxide decomposes to nitrogen oxide and oxygen gas

The reaction is second order for with a rate constant of at 300°C. If the initial [NO₂] is 0.260 M, it will take ________ s for the concentration to drop to 0.150 M

a) 1.01    b) 5.19     c) 0.299      d) 0.0880     e) 3.34

The time taken is 5.19 seconds

Explanation:

The integrated rate law equation for second order reaction follows:

where,

k = rate constant =

t = time taken  = ?

[A] = concentration of substance after time 't' = 0.150 M

= Initial concentration = 0.260 M

Putting values in above equation, we get:

Hence, the time taken is 5.19 seconds

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