Question

1. In the reaction 4 NH3 + 5 O2 4 NO + 6 H2O which of...

1. In the reaction 4 NH3 + 5 O2 4 NO + 6 H2O which of the following is true? a. The rate of ammonia disappearance is equal to 1.50 times the rate of water appearance b. The rate of oxygen disappearance is equal to the rate of (NO) appearance minus the rate of water appearance. c. The rate of ammonia disappearance is equal to 1.25 times the rate of oxygen disappearance. d. The rate of (NO) appearance is equal to 1.25 times the rate of oxygen disappearance e. None of the above

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Homework Answers

Answer #1

4 NH3 + 5 O2 -------> . 4 NO + 6 H2O

first write rate equation

rate = 1/4 (-d[NH3] / dt) = 1/5 (-d[O2] /dt) = 1/4 (+d[NO] / dt) = 1/6 (+d[H2O] / dt

here -ve sign indicate the decrease in concentration

+ve charge in dicate the increase in concentration

from this expression we can answer this question

correct answer is d. The rate of (NO) appearance is equal to 1.25 times the rate of oxygen disappearance

we will prove it from above equation

1/4 (+d[NO] / dt) = 1/5 (-d[O2] /dt)

(+d[NO] / dt) = 4/5  (-d[O2] /dt)

(+d[NO] / dt) = 1.25 (-d[O2] /dt)

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