find the no.of moles of oxygen molecules present in 56 grams of o2
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One mole of oxygen gas, which has the formula O2, has a mass of 32 g and contains 6.02 X 1023 molecules of oxygen but 12.04 X 1023 (2 X 6.02 X 1023) atoms, because each molecule of oxygen contains two oxygen atoms.
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56 × 2 = 112
No. Of moles present = 112
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