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H(2)(g) + Ar(g) underset(k(r ))overset(k...

`H_(2)(g) + Ar(g) underset(k_(r ))overset(k_(f))hArr 2H(g)+Ar(g)`
`k_(f)= 2.2xx10^(4)Lmol^(-1)s^(-1)` and `k_(c )= 1.02xx10^(-4)` at `3000 K`. What is the value of `k_(r )`?

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`k_(c )=k_(f)//k_(r )`
`:.k_(r )(2.2xx10^(4)Lmol^(-1)s^(-1))/(1.02xx10^(-4)molL^(-1))= 2.15xx10^(8)L^(2)mol^(-2)s^(-1)`
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