The mass fraction of oxygen in aluminum oxide is …
| August 17, 2021 | education
1. Let’s find the molecular weight of aluminum oxide Al2O3.
Mr = (Al2O3) = 27 × 2 + 16 × 3 = 102.
2. Find the mass fraction of oxygen in aluminum oxide by dividing the mass of oxygen atoms in the oxide molecule by the mass of the molecule. We will express the mass fraction as a percentage.
W = (48: 102) × 100% = 47.06%.
Answer: w (O) = 47.06%.
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