Answer : The number of moles of required are, 0.2 moles
Explanation :
First we have to calculate the moles of .
Now we have to calculate the moles of .
The dissociation chemical reaction will be,
From this reaction we conclude that,
As, 2 moles of obtained from 1 mole of
So, 0.4 moles of obtained from mole of
Therefore, the number of moles of required are, 0.2 moles