Study Guides/Chemistry/Molar Mass of Ethylene Glycol
Study Guide · Chemistry

Molar Mass of Ethylene Glycol (C₂H₆O₂)

Ethylene Glycol is a widely used chemical, famously known for being the primary ingredient in automotive antifreeze (coolant) because it lowers the freezing point of water. Let's calculate its molar mass.

Question (Click to Flip)

What is the molar mass of ethylene glycol?

Answer

The molar mass of ethylene glycol (C2H6O2) is approximately 62.08 g/mol.

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Key Facts

Common Name: Ethylene Glycol (Used as Antifreeze).

Formula: C₂H₆O₂.

Molar Mass: 62.08 g/mol.

1. The Chemical Formula

Before calculating the mass, we need the formula.

  • The chemical formula for Ethylene Glycol is C₂H₆O₂.
  • It is an organic compound with two carbon atoms, six hydrogen atoms, and two oxygen atoms.

2. The Atomic Masses

We use the standard atomic masses from the periodic table:

  • Carbon (C): ~ 12.01 g/mol
  • Hydrogen (H): ~ 1.01 g/mol
  • Oxygen (O): ~ 16.00 g/mol

3. Step-by-Step Calculation

We multiply the atomic mass by the number of atoms present in the formula:

  • Carbon: 2 atoms × 12.01 = 24.02
  • Hydrogen: 6 atoms × 1.01 = 6.06
  • Oxygen: 2 atoms × 16.00 = 32.00

Total Molar Mass = 24.02 + 6.06 + 32.00 = 62.08 g/mol

Therefore, the molar mass (or molecular mass) of Ethylene Glycol is 62.08 g/mol (often rounded to 62 g/mol in standard textbooks).

Questions and Answers

What is the molar mass of ethylene glycol?+

The molar mass of ethylene glycol (C2H6O2) is approximately 62.08 g/mol.

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