What are the rates of production of ${ N }_{ 2 }$ and ${ H }_{ 2 }$?

CBSE Class 12 CBSE Class 12 Chemistry
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The decomposition of N{ H }_{ 3 } on platinum surface,

is a zero order with k = 2.5x 10-4 mol L-1s-1
What are the rates of production of { N }_{ 2 } and { H }_{ 2 }?

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