Question

Urea [CO(NH₂)₂] is an important nitrogenous fertilizer. Urea is sold in 50 kg sacks. What mass of nitrogen is in one sack of urea?

Answer 1

Molecular mass of urea = 12 + 16+2(14+2) = 60g

60g of urea contains nitrogen = 28g

So, in 50g of urea, nitrogen present = `28/60 xx 50`

∴ 50 kg of urea contains nitrogen = 23.33 kg