A compound containing 4.07% Hydrogen, 24.27% Carbon & 71.67% Chlorine. Molecular Mass is 98.96g. What are it's emperial formula & molecular formula ?

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Solution

Element
Percentage Ratio
Simple Ratio
Empirical Formula
Carbon
24.27/12 = 2.02
2.02/2.01 =1
CH₂Cl
Hydrogen
4.07/1 = 4.07
4.07/2.01 =2

Chlorine
71.67/35.5 = 2.01
2.01/2.01 = 1

Empirical formula weight: CH₂Cl = 12 + 1x2 + 35.5
= 49.5
Molecular formula ratio = 98.96/49.5 â‰ˆ 2
Molecular formula = C₂H₄Cl₂

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Element	Percentage Ratio	Simple Ratio	Empirical Formula
Carbon	24.27/12 = 2.02	2.02/2.01 =1	CH₂Cl
Hydrogen	4.07/1 = 4.07	4.07/2.01 =2
Chlorine	71.67/35.5 = 2.01	2.01/2.01 = 1

A compound containing 4.07% Hydrogen, 24.27% Carbon & 71.67% Chlorine. Molecular Mass is 98.96g. What are it's emperial formula & molecular formula ?

ElementPercentage RatioSimple RatioEmpirical FormulaCarbon24.27/12 = 2.022.02/2.01 =1CH2ClHydrogen4.07/1 = 4.074.07/2.01 =2 Chlorine71.67/35.5 = 2.012.01/2.01 = 1 Empirical formula weight: CH2Cl = 12 + 1x2 + 35.5 = 49.5Molecular formula ratio = 98.96/49.5 â‰ˆ 2Molecular formula = C2H4Cl2