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Question

224 cm3 of ammonia undergoes catalytic oxidation in presence of Pt to given nitric oxide and water vapour. Calculate the volume of oxygen required for the reaction. All volumes measured at room temperature and pressure.

Mole Concept

Chemistry, Class 10, ICSE, J Dalal

July 31, 2024

Answer

[By Lussac’s law]

4NH₃ + 5O₂ ⟶ 4NO + 6H₂O

4 vol : 5 vol ⟶ 4 vol : 6 vol

To calculate the volume of oxygen required.

NH₃ : O₂

4 : 5

224 : x

⇒ x = 224 × $5\over 4$ = 280 cm³

Therefore, volume of oxygen required is 280 cm³.

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