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Question: Answered & Verified by Expert
$56 \mathrm{~g}$ of nitrogen and $8 \mathrm{~g}$ of hydrogen gas are heated in a closed vessel. At equilibrium $34 \mathrm{~g}$ of ammonia are present. The equilibrium number of moles of nitrogen, hydrogen and ammonia are respectively
ChemistryChemical EquilibriumCOMEDKCOMEDK 2016
Options:
  • A $1,1,2$
  • B $2,1,2$
  • C $1,2,2$
  • D $2,2,1$
Solution:
1806 Upvotes Verified Answer
The correct answer is: $1,1,2$



$\therefore$ Mass of $N_{2}$ left $=56-28=28$ g
$\therefore$ Moles of $\mathrm{N}_{2}$ left $=\frac{28}{28}=1$ mole
Mass of $\mathrm{H}_{2}$ left $=8-6=2 \mathrm{~g}$
$\therefore$ Moles of $\mathrm{H}_{2}$ left $=\frac{2}{2}=1$ mole
Moles of ammonia $=\frac{34}{17}=2$ moles

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