Question

$A_3\left(g\right)\rightleftharpoons 3A\left(g\right)$. In the above reaction. the initial concentration of $A_3$ is $a$ moles/lit. If $x$ is degree of dissociation of $A_3$. The total number of moles at equilibrium will be:

• A. $a-3ax$
• B. $\frac{a}{3}-x$
• C. $a-2ax$
• D. None of these

Answer 1

The correct option is D None of these

$A_3\left(g\right)\rightleftharpoons 3A\left(g\right)$

a 0

$a-ax$ $3ax$

Total number of moles $=a-ax+3ax=a+2ax$