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Given N2(g)+3H2(g)=2NH3(g), triangleH^@=...

Given `N_2(g)+3H_2(g)=2NH_3(g),` `triangleH^@`=-22kcal. The standard enthalpy of formation of `NH_3` gas is:

A

`-11 kcal/mol`

B

`11 kcal/mol`

C

`-22 kcal/mol`

D

`22 kcal/mol`

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The correct Answer is:
A
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