Answer:
             33.41 g of Li
Solution:
The Balanced Chemical equation is ,
                              6 Li(s) + N₂ (g)    →    2 Li₂N (s)
According to equation,
      55.76 g (2 mole) Li₂N is produced from  =  41.4 g (6 mole) Li
So,
              45 g of Li₂N will be produced from  =  X g of Li
Solving for X,
                                X  =  (45 g × 41.4 g) ÷ 55.76 g
                                X  =  33.41 g of Li