A hydrocarbon containing 88.9% carbon has the empirical formula [H = 1 C = 12]

A. CH
B. CH2
C. C2H3
D. C2H5

Correct Answer: Option C

C. C2H3

Explanation

element: C | H
Atomic Mass: 12.011 | 1.008
mass in 100 g of compound 88.9 | 11.100
we calculate the number of moles by dividing the mass by the atomic mass
# moles in 100 g : 7.40155 | 11.01190
molar ratio 7.40155: 11.01190
smallest No: 7.4015
divide by the smallest No. : 1.000: 1.488

Multiply by 2: 2.000 | 2.976

the empirical formula is C2H3