Molecules in 3.2 g of oxygen?
回答 (1)
2016-06-19 2:10 pm
Molar mass of O₂ molecules = 16.00 × 2 g/mol = 32.00 g/mol
No. of moles of O₂ = (3.2 g) / (32 g/mol) = 0.1 mol
1 mole of O₂ contains 6.02 × 10²³ O₂ molecules.
No. of O₂ molecules = (6.02 × 10²³ molecules/mol) × (0.1 mol) = 6.02 × 10²² molecules
No. of moles of O₂ = (3.2 g) / (32 g/mol) = 0.1 mol
1 mole of O₂ contains 6.02 × 10²³ O₂ molecules.
No. of O₂ molecules = (6.02 × 10²³ molecules/mol) × (0.1 mol) = 6.02 × 10²² molecules
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