Question

Urea is an important nitrogenous fertilizer and is sold in 50 kg sacks.what mass of nitrogen is an one sack of urea

Answer 1

Given ⇒
Mass of the Urea in one sac = 50 kg.
= 50000 g.

Chemical Formula of the Urea = NH₂CONH₂
Molecular mass of the Urea = 60 g/mole.
Mass of the Nitrogen in 1 mole of the Urea = 14 × 2
= 28 g.

∵ 60 g of the urea contains 28 g of the N.
∴ 1 g of the urea contains 28/60 g of the N.
∴ 50000 g of the urea contains (28/60) × 50000 g of the N.
 = 23333.33 g of the Nitrogen.


Hence, the mass of the Nitrogen in one sac of the urea is 23,333.33 grams or 23.33 kg.


Hope it helps.