How many oxygen atoms are in of ?

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Problem

How many oxygen atoms are in

0.100\text{ mol}

of

\mathrm{CuSO_4\cdot5H_2O}

? (1)

5.42\times10^{22}

(2)

6.02\times10^{22}

(3)

2.41\times10^{23}

(4)

5.42\times10^{23}

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