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# What does 1 Mole of water molecules has?

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## One mole:"One mole contains exactly $6.02214076×{10}^{23}$ elementary entities. This number is the fixed numerical value of the Avogadro constant, NA, and is known as the Avogadro number."It is expressed in the unit ${\mathrm{mol}}^{-1}$.One mole of Water $\left({\mathrm{H}}_{2}\mathrm{O}\right)$:Water is made up of two hydrogen atoms and one oxygen atom.One mole of the water molecule has $18.02\mathrm{g}$ this can be calculated by adding the masses of a number of atoms involved in the formation of the water molecule i.e. 2 hydrogen atoms and one oxygen atom.$\mathrm{Mass}\mathrm{of}\mathrm{water}=\left(2×1.008\right)+16.00\approx 18.02\mathrm{g}$

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