1. Calculate the number of moles present in 23 g of sodium. (Atomic mass of sodium = 23)
Given mass of Sodium = 23g
Molar mass (that is mass of 6.023 X 1023 atoms) of Sodium [Na] = 23g
Therefore, number of moles 'n' = Given mass 'm' / Molar mass 'M'
ie, n = 23 / 23
=1 mole.
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