Question

Find out the molecular mass of aluminium oxide (Al2O3) ?

Answer 1

Aluminum oxide has a molar mass of 101.961277 g/mol. To find the molar mass of aluminum oxide, you need to multiply the atomic weight of aluminum (26.9815385) by 2 because there are two atoms of aluminum in the formula: 26.9815385 * 2 = 53.963077.

Answer 2

The molecular mass of Al₂O₃ (Aluminum  Oxide) is 102g/mol.

• The Aluminum oxide chemical name is Al₂O₃.

• One mole of Al₂O₃ contains 2 moles of  Aluminum atoms and 3 moles of oxygen atoms.

• The molar mass of Al is experimentally found to be 26.98 u, but for calculation, we often assume the molar mass of Al as 27u.

• The molar mass of Oxygen is experimentally found to be 15.99 u, but for calculation purposes, we assume the molar mass of O as 16u.

• Molecular mass of Al₂O₃ = (2×Molar mass of Al) + (3×Molar mass of O)

        = (2 × 27 + 3 × 16) u = 102g/mol.