Mole Concept and Stoichiometry — Question 17

Molar mass of urea (CON₂H₄) = 12 + 16 + 28 + 4 = 60 g

Molar mass of nitrogen (N₂) = 2 x 14 = 28 g

60 g urea has mass of nitrogen = 28 g

∴ 100 g urea will have mass

= $\dfrac{28 \times 100 }{60}$

= 46.67%