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Relationship between Vapor Density & Relative Molecular Mass

a substance w...

Question

a substance with a molecular mass of 34 is 5.9% hydrogen and 94.1%
oxygen .what is its molecular formula

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Solution

Dear Student,

$m o l e s o f H = 5.9 / 1 = 5.9 m o l e s o f O = 94.1 / 16 = 5.88 m o l e r a t i o o f H : O i s 1 : 1 e m p i r i c a l f o r m u l a i s (H O)_{n} (M . w t o f H O i s 17) M . w t = 34 h e n c e v a l u e o f n = 34 / 17 = 2 H e n c e M o l e c u l a r f o r m u l a o f c o m p o u n d i s H_{2} O_{2}$

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