Out of the following, a 32g sample of oxygen, O2, gas is equal to:?

2017-12-11 4:52 am

* the mass of half a mole
* the mass of one atom
* the mass of one mole
* the mass of one molecule

回答 (1)

2017-12-11 5:00 am

Atomic mass of O = 16
Molar mass of O₂ = 16 × 2 g/mol = 32 g/mol
No. of moles of O₂ = (32 g) / (32 g/mol) = 1 mol

The answer: the mass of one mole

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