A compound x with molar mass 108 g mol − 1 undergoes acetylation to give product with molar mass 192 g mol − 1 . The number of amino groups in the compound x is ________.

Step-by-step solution

The compounds like amines and alcohols undergo acetylation with acetyl chloride. During this reaction, one proton of amine or alcohol is replaced with one acetyl group( CH 3 CO - ). The molar mass of the acetyl group is 43 g / mol . The increase in molar mass due to one acetyl group is 43 - 1 = 42 g / mol . The molar mass of reactant is 108 g / mol . The molar mass of product is 192 g / mol . The change in mass is 84 . Hence, the number of acetyl groups = 84 42 = 2