A compound comprised of carbon and hydrogen is completely combusted with excess oxygen to produce 44.0 g of carbon dioxide and 27.0 g of water. Determine the simplest chemical formula for this compound.
A compound comprised of carbon and hydrogen is completely combusted with excess oxygen to produce 44.0 g of carbon dioxide and 27.0 g of water. Determine the simplest chemical formula for this compound.
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
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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A compound comprised of carbon and hydrogen is completely combusted with excess oxygen to produce 44.0 g of carbon dioxide and 27.0 g of water. Determine the simplest chemical formula for this compound.
Expert Solution
Step 1
moles of carbon dioxide produced = mass of carbon dioxide / molar mass of carbon dioxide = 44/44 = 1
And moles of water produced = mass of water / molar mass of water = 27/18 = 1.5
Since each mole of water has 2 moles of H in it
Hence moles of H = moles of water X 2 = 2 X 1.5 = 3
And since each mole of Carbon dioxide has 1 moles of C in it
=> moles of C = moles of carbon dioxide = 1
Since all the C and H is coming from the hydrocarbon
Hence mole ratio of C : H in hydrocarbon = 1 : 3
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