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The rate constant of the reaction, 2N(...

The rate constant of the reaction,
`2N_(2)O_(5) to 4NO_(2) + O_(2)` at 300 K is `3 xx 10^(-5)s^(-1)`. If the rate of the reaction at the same temperaturre is `2.4 xx 10^(-5)` mol `dm^(-3)s^(-1)`, then the molar concentration of `N_(2)O_(5)` is

A

0.4 M

B

0.8 M

C

`0.04` M

D

`0.08` M

Text Solution

Verified by Experts

The correct Answer is:
B
b) For first order reaction,
`Rate =k[N_(2)O_(5)]`
`[N_(2)O_(5)]=("Rate")/k=(2.4 xx 10^(-5))/(3 xx 10^(-5)) "mol" dm^(-3)`
`=0.8 "mol" dm^(-3)`
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