What is the Molar Mass of Octane?

The molar mass of octane (C₈H₁₈) is calculated by summing the atomic masses of all the atoms in its chemical formula. Here’s how it’s done:

• Carbon (C) has an atomic mass of approximately 12.01 g/mol.
• Hydrogen (H) has an atomic mass of approximately 1.008 g/mol.

Octane has 8 carbon atoms and 18 hydrogen atoms. Therefore, the molar mass is calculated as follows:

Molar Mass of Octane = (8 × 12.01 g/mol) + (18 × 1.008 g/mol)

Let’s break it down:

• 8 × 12.01 g/mol = 96.08 g/mol (for carbon)
• 18 × 1.008 g/mol = 18.144 g/mol (for hydrogen)

Adding these together:

96.08 g/mol + 18.144 g/mol = 114.224 g/mol

So, the molar mass of octane is approximately 114.224 g/mol.