The ammonia (NH3) released on quantitative reaction of 0.6 g urea (NH2CONH2) with sodium hydroxide (NaOH) can be neutralized by :
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2 × mole of Urea mole of NH3 ........(1)
mole of NH3 = mole of HCl ........(2)
mole of HCl = 0.02 mole