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Calculate The Molar Mass of The Following Compounds Urea

Reviewed by Calculator Editorial Team

Urea (NH₂CONH₂) is an organic compound with important applications in agriculture and medicine. Calculating its molar mass is essential for stoichiometric calculations in chemistry. This guide explains how to compute urea's molar mass and provides a precise calculator.

How to Calculate Molar Mass

The molar mass of a compound is the sum of the atomic masses of all atoms in its molecular formula. For urea (NH₂CONH₂):

Formula

Molar Mass = (Atomic Mass of N × 2) + (Atomic Mass of H × 4) + (Atomic Mass of C × 1) + (Atomic Mass of O × 1)

Using standard atomic masses:

  • Nitrogen (N) = 14.007 g/mol
  • Hydrogen (H) = 1.008 g/mol
  • Carbon (C) = 12.011 g/mol
  • Oxygen (O) = 15.999 g/mol

Note: Atomic masses are based on the IUPAC standard and may vary slightly depending on the source.

Example Calculation

Let's calculate the molar mass of urea step-by-step:

  1. Count the atoms: 2 N, 4 H, 1 C, 1 O
  2. Multiply each atom count by its atomic mass:
    • 2 × 14.007 = 28.014 g/mol
    • 4 × 1.008 = 4.032 g/mol
    • 1 × 12.011 = 12.011 g/mol
    • 1 × 15.999 = 15.999 g/mol
  3. Sum the values: 28.014 + 4.032 + 12.011 + 15.999 = 60.056 g/mol

The molar mass of urea is approximately 60.056 g/mol.

Common Questions

What is the molar mass of urea?
The molar mass of urea (NH₂CONH₂) is approximately 60.056 g/mol.
How do I calculate molar mass?
Sum the atomic masses of all atoms in the molecular formula, multiplied by their counts in the formula.
Why is urea molar mass important?
Molar mass is crucial for stoichiometric calculations in chemistry, including determining reaction quantities and concentrations.