Combustion of 7.73 mg of an unknown substance yields 13.3 mg CO2 and 4.06 mg H;O. The unknown substance contains only C, H, and O. What is the percentage of each element in this substance? Percentage of C=| Percentage of H= Percentage of O =

Combustion of 7.73 mg of an unknown substance yields 13.3 mg CO2 and 4.06 mg H;O. The unknown substance contains only C, H, and O. What is the percentage of each element in this substance? Percentage of C=| Percentage of H= Percentage of O =

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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Question

Combustion of 7.73 mg of an unknown substance yields 13.3 mg CO2 and 4.06 mg H20. The unknown substance contains only C, H, and O. What is the percentage of each
element in this substance?
Percentage of C =
Percentage of H=
Percentage of O% =

Expert Solution

Step 1

Given: Compound contains only C, H and O.

Mass of compound combusted = 7.73 mg = 0.00773 g (Since 1 g = 1000 mg)

Mass of CO₂ produced = 13.3 mg = 0.0133 g.

And the mass of H₂O produced = 4.06 = 0.00406 g.

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