   # Which of the following hydrocarbons has the highest mass percentage of carbon? (a) methane, CH 4 (b) ethane, C 2 H 6 (c) propane, C 3 H 8 (d) butane, C 4 H 10 ### Chemistry & Chemical Reactivity

9th Edition
John C. Kotz + 3 others
Publisher: Cengage Learning
ISBN: 9781133949640

#### Solutions

Chapter
Section ### Chemistry & Chemical Reactivity

9th Edition
John C. Kotz + 3 others
Publisher: Cengage Learning
ISBN: 9781133949640
Chapter 2.10, Problem 1RC
Textbook Problem
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## Which of the following hydrocarbons has the highest mass percentage of carbon? (a) methane, CH4 (b) ethane, C2H6 (c) propane, C3H8 (d) butane, C4H10

Interpretation Introduction

Interpretation: The hydrocarbon having highest mass percent is to be identified from the given options.

Concept introduction:

Mass percent of elements of a compound is the ratio of mass of element to the mass of whole compound and multiplied with hundred.

### Explanation of Solution

In Butane, C4H10 , there are 4 carbons and 10 hydrogen’s present. Mass of carbon is 12 times larger than mass of hydrogen. So, the 4 carbons will have a mass of 48. The molar mass of butane is approximately 58.

Mass percent of elements of a compound is the ratio of mass of element to the mass of whole compound and multiplied with hundred.

Hence, the mass percent of carbon is approximately 82%.

Therefore, the option for the hydrocarbon having highest mass percent is (d)

(b) Methane, CH4

(c) Ethane, C2H6

(d) Propane, C3H8

In Methane, CH4 , there is 1 carbons and 4 hydrogen’s present

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