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  4. How many moles of nitrogen are needed to produce 8.2 moles of ammonia by reaction with hydrogen?

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Q. How many moles of nitrogen are needed to produce 8.2 moles of ammonia by reaction with hydrogen?

JamiaJamia 2010

Solution:

The balanced chemical equation is $ \underset{\begin{smallmatrix} 1\,mol \\ \,\,\,\,? \end{smallmatrix}}{\mathop{{{N}_{2}}}}\,+3{{H}_{2}}\xrightarrow[{}]{{}}\underset{\begin{smallmatrix} 2\,mol \\ 8.2\,mol \end{smallmatrix}}{\mathop{2N{{H}_{3}}}}\, $ 2 moles of $ N{{H}_{3}} $ are produced from $ {{N}_{2}}=1 $ mol $ \therefore $ 8.2 moles of $ N{{H}_{3}} $ will be produced from $ {{N}_{2}} $ $ =\frac{1}{2}\times 8.2 $ $ =4.1\text{ }mol $