Answer :

(i) 92 grams of sodium:


Given: Mass of sodium = 92g


Molar mass = 23g/mol


To calculate the number of moles, we apply the formula:





Number of moles = 4 mol


Thus, the number of moles in 92 grams of sodium is 4 mol.


(ii) 108 grams of aluminium:


Given: Mass of aluminium = 108g


Molar mass = 27g/mol


To calculate the number of moles, we apply the formula:





Number of moles = 4 mol


Thus, the number of moles in 108 grams of aluminium is 4 mol.


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