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9.9vogadro's number
represents the number of units in one mole of any substance. This has the value
of 6.022 x 10^23 units / mole. This number can be used to convert the number of
atoms or molecules into number of moles. Calculation are as follows:

 6.00x10^9 Co atoms x (  1 mol Co / 6.022 x 10^23 atoms Co ) = 9.96 x 10^-15 mol Co

The number of moles should be \(9.96 \times 10^{-15} mol Co\)

Calculation of a number of moles:

Avogadro's number shows the number of units in one mole of any substance.

This has the value of \(6.022 \times 10^{23}\) units/mole.

Now the computation should be

\(= 6.00\times 10^{9}Co\ atoms \times ( 1 mol Co / 6.022 \times 10^{23} atoms Co )\)

= \(9.96 \times 10^{-15} mol Co\)

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