Question

Q.An organic compound consist 49.36. carbon
6.84% Hydrogen, its vapour density is is
I determine the molecular formula of compounds​

Answer 1

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Secondary SchoolChemistry 5 points

An organic compound contain 49.3% carbon, 6.84% hydrogen and also present oxygen. its vapour density is 73. find the molecular formula of the compound

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Answers

Anilsharma01

Anilsharma01 Ambitious

S.No.

Element

Percentage

Atomic mass

No. of moles = Percent/Atomic mass

Simplest molar ratio

Simplest whole no. molar ratio

1

C

49.3

12

49.3/ 12 =4.10

4.10/2.74 = 1.49

3

2

H

6.84

1

6.84/1 = 6.84

6.84/2.74 = 2.49

5

3

O

43.86

16

43.86/ 16 = 2.74

2.74/2.74 = 1

2

Empirical formula = C3H5O2

Empirical formula mass =

3×12 + 5×1 + 2×16=73

u

n =

Molecular mass

Empirical formula mass

=

146

73

= 2

So , the molecular formula is (C3H5O2)2 = C6H10O4

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