Question

Please Help!!

Answer 1

Mass of N₂ will be formed : 50.12 g

Further explanation

Reaction

2 NH₃(g) + 3 CuO(s) → N₂(g) + 3 Cu(s) + 3 H₂O(g)

moles NH₃ = 3.58

ratio mol NH₃ : mol N₂ = 2 : 1

so mol N₂ :

$\tt \dfrac{1}{2}\times 3.58=1.79$

mass N₂ (MW=28 g/mol) :

$\tt 1.79\times 28=50.12~g$