Neco 2020 Chemistry Question 5

Practice essay / theory question 5 from the 2020 Neco Chemistry examination. This question covers Stoichiometry .

Neco 2020 Chemistry Essay / Theory

Topic: Stoichiometry

Question 5 NECO • 2020 • CHEMISTRY • essay

A mixture of nitrogen gas and hydrogen gas is placed in a sealed container at 298 K and 1 atm. The container initially contains 5.0 L of N₂ and 8.0 L of H₂. The gases react according to the equation: N₂(g) + 3 H₂(g) → 2 NH₃(g). After the reaction is complete, 1.20 g of NH₃ is collected.

( a )

Calculate the number of moles of N₂ and H₂ present initially in the container. (Use R = 0.0821 L·atm·mol⁻¹·K⁻¹)

( b )

Identify the limiting reagent and calculate the theoretical mass of NH₃ that could be formed.

( c )

Calculate the percent yield of NH₃ obtained in the experiment.

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This is Neco 2020 Chemistry Question 5. It is one of the essay questions from the 2020 Neco Chemistry examination.

The question covers Stoichiometry .

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