Combustion analysis of an organic compound to determine the percentages of carbon, hydrogen, and oxygen in the compound depends on which of the following assumptions?
A)The compound burns completely to form carbon dioxide and water.
B)All the oxygen in the products comes from the added oxygen gas.
C)The mass of the carbon dioxide produced equals the mass of the carbon in the sample.
D)The moles of water produced equal the moles of hydrogen in the sample.
E)The mass of oxygen in the sample is the difference between the mass of the sample and the sum of the masses of carbon dioxide and water produced.

Question

Quizplus · Accepted Answer

The combustion analysis assumes that the compound burns completely to form carbon dioxide and water, which allows for the determination of the percentages of carbon, hydrogen, and oxygen in the sample based on their masses. Assumptions B, C, D, and E are all true statements about the process of combustion analysis, but they are not fundamental assumptions that the method is based on.

Combustion Analysis of an Organic Compound to Determine the Percentages