A sample of Vitamen C contains 2.58*10power 24 oxygen atoms . How many moles of a oxygen is present in the sample?
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6.023 × 1023 oxygen atoms = 1 mole of oxygen atoms
1 oxygen atom = 1/6.023 × 1023 mole of
1 oxygen atom = 1/6.023 × 1023 mole of
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If 80percent of an element has an atomic mass 42u and 20percent has an atomic mass 43u . What is the average atomic mass of the mixture.
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