An organic compound was found to contain 10.15% Carbon, 0.84% Hydrogen & 88.98% Chlorine. Molar mass of the compound was found to be 120g/mol. What is the molecular formula of the compound?
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carbon
10.15/12=0.84
Hydrogen
0.84/1=0.84
chlorine
88.98/35.5=2.50
Simple ratio
carbon
0.84/0.84=1
Hydrogen
0.84/0.84=1
chlorine
2.5/0.84=2.97=3
empirical formula
CHCl3
Empirical mass = 119.5g=120g
molar mass = 120 g
As per the formula,
molar mass = n × empirical mass
n = 120/120 =1
empirical mass = molar mass
empirical formula = molecular formula
molecular formula = CHCl3
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