The mole

Tutorial 1

    

Definition of the mole One mole of atoms are $ 6.023 \cdot 10^{23} $ atoms One mole of molecules are $ 6.023 \cdot 10^{23} $ molecules If $ n $ denotes the number of moles of atoms, then Number of atoms = $ n \cdot 6.023 \cdot 10^{23} $ If $ n $ is the number of moles of molecules, then Number of molecules = $ n \cdot 6.023 \cdot 10^{23} $

How many are A) $ 2$ moles of helium atoms ? B) $ 1.2 \cdot 10^{-13} $ moles of water molecules ?

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