Difficult
For the reaction $A_{3(g)} \rightleftharpoons 3A_{(g)}$,the initial moles of $A_3$ is $a$. If $\alpha$ is the degree of dissociation of $A_3$,then the total number of moles at equilibrium will be:
- A$a - a\alpha + 3a\alpha$
- B$a + 2a\alpha$
- C$a(1 + 2\alpha)$
- DNone of the above
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