Answer :

we know that in the case of compounds –




Molecular mass of water (H2O) = (2 + 16 ) = 18 grams


Molecular mass of ammonia (NH3) = ( 14+3) = 17 grams


Molecular mass of glucose ( C6H12O6) = ( 72 + 12+ 96) = 180 grams


Applying the above formula to all 3 cases-


(i) Mass = 5 x 18 = 90 grams


(ii) Mass = 2 x 17 = 34 grams


(iii) Mass = 2 x 180 = 360 grams


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