Measurements show that unknown compoundX has the following composition: element mass % carbon 62.0% hydrogen 10.4% oxygen 27.5% Write the empirical chemical formula of X.

Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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O STOICHIOMETRY
Elemental analysis
Measurements show that unknown compound X has the following composition:
element mass %
carbon
62.0%
hydrogen 10.4%
охудen
27.5%
Write the empirical chemical formula of X.
O
5.
Explanation
Check
1II
Transcribed Image Text:O STOICHIOMETRY Elemental analysis Measurements show that unknown compound X has the following composition: element mass % carbon 62.0% hydrogen 10.4% охудen 27.5% Write the empirical chemical formula of X. O 5. Explanation Check 1II
Expert Solution
Step 1

1)convert the % mass into grams. Assume sample is of 100g 

carbon = 62 g

hydrogen = 10.04g

oxygen = 27.5g

2) convert them into moles

moles = given weight/ molar mass

moles of Carbon = 62/12 = 5.166

moles of oxygen = 27.5/16 = 1.718

moles of hydrogen = 10.04/1 = 10.04

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