How many grams of Li3N are produced when 25 grams of N2 react with excess Li?

Question

Balanced form: 6 Li + N2 = 2 Li3N

Answer 1

6 Li + N2 = 2 Li3N

Use molar mass:

25g N2 (1molN2/28.02gN2)=0.89222mol N2

Use coefficients:

0.89222mol N2 (2mol Li3N/1mol N2)=1.7844 mol Li3N

use molar mass:

1.7844 mol Li3N (34.83gLi3N/1molLi3N)=6.2152 g Li3N