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Question: The equilibrium N2 (g) + O2 (g)\(\rightleftharpoons\) 2NO (g) is estabilished in a reaction vessel o...

The equilibrium N2 (g) + O2 (g)⇌\rightleftharpoons 2NO (g) is estabilished in a reaction vessel of 2.5 L capacity. The amounts of N2 and O2 taken at the start were respectively 2 moles and 4 moles. Half a mole of nitrogen has been used up at equilibrium. The molar concentration of nitric oxide is

A

0.2

B

0.4

C

0.6

D

0.1

Answer

0.4

Explanation

Solution

N2 + O2 ⇌\rightleftharpoons 2NO

Initial 2 moles 4moles

At Eq. 2 –12\frac { 1 } { 2 } 4 – 12\frac { 1 } { 2 }

2 × 12\frac { 1 } { 2 }= 1 mol

Molar concentration of NO at equilibrium = =