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  • A sample of vitamic C is known to contain 2.58 \times10^{24} oxygen atoms. How many moles of oxygen atoms are present in the sample?

A sample of vitamic C is known to contain 2.58 \times10^{24}oxygen atoms. How many moles of oxygen atoms are present in the sample?

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Answer:

1 mole of oxygen atoms = 6.023 \times 10^{23} atoms
∴ Number of moles of oxygen atoms =\frac{2.58\times 10^{24}}{6.023\times 10^{23}}
=4.28moles

The mole concept is a convenient method of expressing the amount of a substance. Any measurement can be broken down into two parts – the numerical magnitude and the units which the magnitude is expressed in. For example, when the mass of a ball is measured to be 2 kilograms, the magnitude is ‘2’ and the unit is ‘kilogram’.

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