There is an error in the first sentence of the question; the right format is:
Suppose a 500.mL flask is filled with 1.9mol of NO3 and 1.6mol of NO2.
It should be NO2 and not NO.
Answer:
The equilibrium molarity of NO = 0.21695 m
Explanation:
Given that :
the volume = 500 mL = 0.500 m
number of moles of
number of moles of
Then we can calculate for their respectively concentrations as :
The chemical reaction can be written as:
The ICE table is as follows;
Initial 3.8 - 3.2
Change +x x -2x
Equilibrium 3.8+x +x 3.2 - 2x
Using quadratic formula;
=
= 0.21695 OR -3.7283
Going by the positive value;
x = 0.21695
= 4.01695 m
[NO] = x = 0.21695 m
= 3.41695 m