1.

The rate of the first order reaction X to Products is 7.5 xx 10^(-4) mol L^(-1) min^(-1) when the concentration of X is 0.5mol L^(-1). The rate constant is

Answer»

`3.75xx 10^(-4)s^(-1)`
`2.5 xx 10^(-5)s^(-1)`
`1.5 xx 10^(-3)s^(-1)`
`3.0 xx 10^(4)s^(-1)`

SOLUTION :RATE `=7.5 xx 10^(-4) mol L^(-1)mi n^(-1)`
`=(7.5 xx 10^(-4))/60 mol L^(-1)s^(-1)`
`= 1.25 xx 10^(-5) mol L^(-1) s^(-1)`
Rate = k [X].
HENCE, `k=(1.25xx 10^(-5))/0.5= 2.5 xx 10^(-5)s^(-1)`.


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