Answer:
Mass of nitrogen produce as a result of decomposition of ammonia = 70 g
Explanation:
Given data:
Mass of ammonia = 85 g
Mass of nitrogen produce = ?
Solution:
Chemical equation:
2NH₃ → N₂ + 3H₂
Number of moles of ammonia:
Number of moles = mass/molar mass
Number of moles = 85 g/ 17 g/mol
Number of moles = 5 mol
Now we will compare the moles of ammonia with nitrogen.
NH₃ : N₂
2 : 1
5 : 1/2×5 = 2.5 mol
Mass of nitrogen:
Mass = number of moles × molar mass
Mass = 2.5 mol × 28 g/mol
Mass = 70 g
