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How many moles of BaCO3 contain 1.5 moles of oxygen atoms?

1. 0.5
2. 1
3. 3
4. 6.02 x 10²³

Correct answer: 0.5

Solution

BaCO3 = Ba + C + 3O. So 1 mole of BaCO3 has 3 moles of O atoms. For 1.5 moles of O atoms: moles of BaCO3 = 1.5/3 = 0.5 mol.

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