<u>Answer:</u> At equilibrium, the true statement is [R] = [Z] > [Q]
<u>Explanation:</u>
We are given:
Initial moles of X = 1.0 moles
Initial moles of Q = 1.0 moles
Volume of container = 10.0 L
Molarity is calculated by using the formula:
For the given chemical equation:
<u>Initial:</u> 0.1 0.1
<u>At eqllm:</u> 0.1-x 0.1-2x x x
The expression of for above equation follows:
We are given:
Putting values in above expression, we get:
Neglecting the value of x = 0.1 because the concentration of Q will become negative, which is not possible
So, equilibrium concentration of X = (0.1 - x) = (0.1 - 0.049) = 0.051 M
Equilibrium concentration of Q = (0.1 - 2x) = [0.1 - 2(0.049)] = 0.002 M
Equilibrium concentration of R = x = 0.049 M
Equilibrium concentration of Z = x = 0.049 M
Hence, at equilibrium, the true statement is [R] = [Z] > [Q]