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List of top Chemistry Questions on Mole concept and Molar Masses asked in BITSAT

How many grams of $ \mathrm{Al_2(SO_4)_3} $ are required to produce 10 L of a 0.5 M solution? (Molar mass = 342 g/mol)
How many moles are present in $ 22\, \text{g} $ of carbon dioxide (CO$_2$)? (Molar mass of CO$_2$ = $ 44\, \text{g/mol} $)