1.

A sample of Vitamin C is known to contain 2.58×10^24 oxygen atoms. How many moles of O2 are present in the sample.Give the answer with appropriate steps.

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6.023 x 1023 ATOMS of oxygen = 1 mole oxygen atom
therefore 2.58 x 1024 atoms of oxygen = 2.58 x 1024 /6.023 x 1023 = 25.8 x 1023/ 6.023 x 1023 = 4.28 moles of oxygen atom



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