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The thermal decomposition of N(2)O(5) oc...

The thermal decomposition of `N_(2)O_(5)` occurs in the following steps:
Step I: `N_(2)O_(5) overset("slow")(rarr) NO_(2)+NO_(3)`
Step II: `N_(2)O_(5)+NO_(3)overset("fast")(rarr)3NO_(2)+O_(2)`
Overall reaction, `2N_(2)O_(5)rarr 4NO_(2)+O_(2)`
Suggest the rate expression.

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Rate `=K[N_(2)O_(5)].` (from slow step)
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