a monobasic acid,containing nitrogen,hydrogen and oxygen oonly,gave the percentage composition by weight as N=22.22% ,H=1.59%.determine the molecular formula of the acid

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Solution

Dear Devika
$w t . o f N = 22.22 g, m o l e o f N = \frac{22.22}{14} = 1.59 w t . o f H = 1.59 g, m o l e o f H = \frac{1.59}{1} = 1.59 w t . o f O = (100 - 23.81) = 76.19 g, m o l e o f O = \frac{76.19}{16} = 4.76 m o l e r a t i o = n_{N}; n_{H}; n_{O} \Rightarrow 1.59 : 1.59 : 4.76 1 : 1 : 3 H e n c e t h e m o l e c u l a r f o r m u l a o f a c i d i s H N O_{3}$

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a monobasic acid,containing nitrogen,hydrogen and oxygen oonly,gave the percentage composition by weight as N=22.22% ,H=1.59%.determine the molecular formula of the acid

Dear ​Devika wt. of N = 22.22 g, mole of N = 22.2214=1.59wt. of H = 1.59 g, mole of H = 1.591=1.59wt. of O = (100 - 23.81) = 76.19g, mole of O = 76.1916 = 4.76mole ratio = nN ; nH ; nO ⇒1.59: 1.59 : 4.76 1: 1: 3 Hence the molecular formula of acid is HNO3 Regards