Empirical formula of a hydrocarbon containing 80% carbon and 20% hydrogen is:

Question

Empirical formula of a hydrocarbon containing 80% carbon and 20% hydrogen is: (A)  CH  (B)  CH2  (C)  CH3  (D)  CH4

Tardigrade Admin · Accepted Answer

Element % Atomic weight Percentage at weight Simple ratio C 80 12 (80/12)=6.67 (6.67/6.67)=1 H 20 1 (20/1)=20.0 (20.0/6.67)=3 Hence, empirical formula of hydrocarbon =CH3 .

Q. Empirical formula of a hydrocarbon containing 80% carbon and 20% hydrogen is:

$C H$

$C H_{2}$

$C H_{3}$

$C H_{4}$

Element
%
Atomic weight
Percentage at weight
Simple ratio
C
80
12
$\frac{80}{12} = 6.67$
$\frac{6.67}{6.67} = 1$
H
20
1
$\frac{20}{1} = 20.0$
$\frac{20.0}{6.67} = 3$
Hence, empirical formula of hydrocarbon $= C H_{3}$ .

Q. Empirical formula of a hydrocarbon containing 80% carbon and 20% hydrogen is:

CH

CH2​

CH3​

CH4​

Element % Atomic weight Percentage at weight Simple ratio C 80 12 1280​=6.67 6.676.67​=1 H 20 1 120​=20.0 6.6720.0​=3 Hence, empirical formula of hydrocarbon =CH3​ .

$C H$

$C H_{2}$

$C H_{3}$

$C H_{4}$

Element
%
Atomic weight
Percentage at weight
Simple ratio
C
80
12
$\frac{80}{12} = 6.67$
$\frac{6.67}{6.67} = 1$
H
20
1
$\frac{20}{1} = 20.0$
$\frac{20.0}{6.67} = 3$
Hence, empirical formula of hydrocarbon $= C H_{3}$ .