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mash [69]
3 years ago
9

A hydrocarbon is a compound that contains mostly carbon and hydrogen. Calculate the percent composition (by mass) of the followi

ng hydrocarbon: C5H12. Enter the percentages of carbon and hydrogen numerically to four significant figures, separated by commas. View Available Hint(s)
Chemistry
1 answer:
Shalnov [3]3 years ago
5 0

Answer: The percentages of carbon and hydrogen numerically to four significant figures is 83.33\% and 16.67\% respectively.

Explanation:

Molar mass of the compound is the mass of 1 mole of compound which is the sum of masses of each element.

Mass of 1 mole of compound= mass of carbon + mass of hydrogen+ = 5(12) + 12(1)= 72 g.

a) Percentage by mass of carbon =\frac{\text {mass of carbon}}{\text {Total mass}}\times 100\ %

Percentage by mass of carbon =\frac{60}{72}\times 100\%=83.33\%

b) Percentage by mass of hydrogen =\frac{\text {mass of hydrogen}}{\text {Total mass}}\times 100\ %

Percentage by mass of hydrogen =\frac{12}{72}\times 100\%=16.67\%

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