The molar masses of CH3COOH,CH3CH2CH2OH,NH2CONH2,HNO3 are
60 g/mol, 60 g/mol, 60 g/mol and 63 g/mol respectively.
Now, 360=0.05.
Hence, 3 g of CH3COOH,CH3CH2CH2OH,NH2CONH2 will form 0.05 moles.
Thus, 3 species form 0.05 mole from 3 g of CH3COOH,CH3CH2CH2OH,NH2CONH2,HNO3.