Answer : The mass of
needed are, 48 grams.
Explanation :
First we have to calculate the moles of 

Now we have to calculate the moles of 
The given balanced chemical reaction is:

From the reaction, we conclude that
As, 2 mole of
produces from 1 mole of 
So, 3 mole of
produces from
mole of 
Now we have to calculate the mass of 

Molar mass of
= 32 g/mole

Therefore, the mass of
needed are, 48 grams.