an organic monobaric acid contains 18% C, 1.55% Hg and 55.04% Cl. itsa mol.net is 129. calculate its molecular formula

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Solution

Percentage of Oxygen = 100 – (18+1.55+55.04)
= 25.41
Element
% Ratio
Simplest ratio
Empirical Formula

Carbon
18/12 = 1.5

1.5/1.5=1

CClO

Chlorine
55.04/35.5 = 1.5

1.5/1.5=1

Oxygen
25.41/16 = 1.58

1.58/1.5= 1.05

Mercury
1.55/200.5 = 0.00

Neglected

Simplest molecular ratio = 129/25.41 = 5.07
The molecular formula = C₅Cl₅O₅

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