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Bohr's Model of a Hydrogen Atom

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Question

calculate the molecular mass of sodium oxide and aluminium oxide

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Solution

1. Chemical formula of sodium oxide = Na₂O
Molecular mass = $2 \times 23 + 16 = 46 + 16 = 62 u$

2. Chemical formula of aluminium oxide = Al₂O₃
Molecular mass = 100 u

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