How many liters of oxygen will be required for the catalytic oxidation of 120 liters of ammonia to nitric oxide (II)?

How many liters of oxygen will be required for the catalytic oxidation of 120 liters of ammonia to nitric oxide (II)? Gas volumes are measured under the same conditions.

4NH3 + 5O2 = 4NO + 6H2O
Let’s make a proportion
for the oxidation of 4 l of ammonia – 5 l of oxygen
for oxidation of 120 l of ammonia – x l of oxygen
Where X = 150 l.

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