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One mole of a compound does not have $\ 6.02· 10^{23}$ atoms, as you say. One mole of a compound has $\ 6.02· 10^{23}$ molecules One mole of water has $\ 6.02· 10^{23}$ molecules H2O, and $\ 3 · 6.02· 10^{23}$ atoms. One mole of H2O has $\ 6.02· 10^{23}$ atoms O, and $\ 2·6.02· 10^{23}$ atoms H.


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