Answer : The excess reagent is, 
Explanation :
First we have to calculate the moles of
and
.


Now we have to calculate the limiting and excess reagent.
The balanced chemical reaction is,

From the balanced reaction we conclude that
As, 1 mole of
react with 1 mole of 
So, 0.068 moles of
react with 0.068 moles of 
From this we conclude that, the moles of
are less than the NaCl. So,
is a limiting reagent because it limits the formation of products and
is an excess reagent.
Hence, the excess reagent is, 