1.

The decompostion of N_(2)O_(5 (g)) to NO_(3(g)) Proceeds as a first order reaction with a half-life period of 30 seconds at a certain temperature . If the initial concentration [N_(2)O_(5)]= 0.4 M , what is the rate constant of the reaction

Answer»

`0.00924 sec^(-1)`
`0.0231 sec^(-1)`
`75 sec^(-1)`
`12 sec^(-1)`

Solution :For a FIRST ORDER REACTION , k `= (0.693)/(t_(1//2)) = (0.693)/(30) = 0.0231 sec^(-1)`


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