How many grams of lithium are needed to produce 45.0g of lithium nitride?

26.899 g of Li

Solution:

The Balance Chemical Equation for given reaction is as follow;

6 Li + N₂ → 2 Li₃N

According to equation,

69.66 g (2 mol) Li₃N is produced by = 41.64 g (6 mol) of Li

So,

45.0 g of Li₃N will be produced by = X g of Li

Solving for X,

X = (45.0 g * 41.64 g) : 69.66 g

X = 26.899 g of Li

Hence, 26.9 g of Lithium is required to produce 45.0 g of Lithium Nitride.