4NH₃ + 5O₂ → 4NO + 6H₂O

From the stoichiometry of the reaction, 4 moles of NH₃ produce 4 moles of NO. Therefore, 2 moles of NH₃ will produce 2 moles of NO.

The correct answer is 2.

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4NH₃ + 5O₂ → 4NO + 6H₂O

From the stoichiometry of the reaction, 4 moles of NH₃ produce 4 moles of NO. Therefore, 2 moles of NH₃ will produce 2 moles of NO.

The correct answer is 2.

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Question:

In the preparation of HNO3 we get NO gas by catalytic oxidation of ammonia. The moles of NO produced by the oxidation of two moles of NH3 will be:

4

6

2

3

Solution:

Ammonia is converted to nitric acid in two stages. It is oxidized (in a sense "burnt") by heating with oxygen in the presence of a catalyst such as platinum with 10% rhodium. The reaction is:

4NH₃ + 5O₂ → 4NO + 6H₂O

From the stoichiometry of the reaction, 4 moles of NH₃ produce 4 moles of NO. Therefore, 2 moles of NH₃ will produce 2 moles of NO.

The correct answer is 2.