Question

Water can split into hydrogen and oxygen under suitable conditions. The equations representing the change is:  2H₂O(I) → 2H₂ (g) + O₂(g)
Ammonia burns in oxygen and the combustion in the presence of a catalyst may be represented as:
2NH₃ (g) +2^1/2O₂ (g) → 2NO (g) + 3H₂O (I)
What mass of steam is produced when 1.5 g of nitrogen monoxide is formed?

Answer 1

Given equation is:
2NH₃ (g) +2^1/2O₂ (g) → 2NO (g) + 3H₂O (I)
Molecular mass of NO = 30
Molecular mass of H₂O = 18
From the equation :
2 moles of NO = 3 moles of H₂O
60g of NO = 54g of H₂O.
1.5g of NO = 54 x 1.5 / 60 = 1.35g of H₂O.