How to calculate the molecular mass of urea?

To calculate the molecular mass of urea (NH₂CONH₂), follow these steps:

1. Identify the atomic masses of the constituent elements: Nitrogen (N) = 14 u, Hydrogen (H) = 1 u, Carbon (C) = 12 u, and Oxygen (O) = 16 u.
2. Write down the molecular formula of urea: NH₂CONH₂.
3. Calculate the total atomic mass for each element in the formula:
   • Nitrogen: 2 atoms × 14 u = 28 u
   • Hydrogen: 4 atoms × 1 u = 4 u
   • Carbon: 1 atom × 12 u = 12 u
   • Oxygen: 1 atom × 16 u = 16 u
4. Add all these values together to get the molecular mass of urea: 28 u + 4 u + 12 u + 16 u = 60 u.

Therefore, the molecular mass of urea is 60 u (atomic mass units).