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82g of oxygen is equivalent to how many moles?

1. 1 mole
2. 1/4 mole
3. 1/2 mole
4. 2 moles

Correct answer: 2 moles

Solution

The molar mass of oxygen (O2) is 32 g/mol. The number of moles is calculated as mass/molar mass. For 82 g of oxygen, moles = 82/32 = 2.56 moles, which is closest to 2 moles.

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