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Ch.3 - Molecules and Compounds
Tro - Chemistry: A Molecular Approach 6th Edition
Tro6th EditionChemistry: A Molecular ApproachISBN: 9780137832217당신이 사용하는 게 아니라요?교과서 변경
모든 교과서Tro 6th EditionCh.3 - Molecules and Compounds문제 105
3장, 문제 105

Combustion analysis of a hydrocarbon produces 33.01 g CO2 and 13.51 g H2O. Calculate the empirical formula of the hydrocarbon.

검증된 단계별 안내
1
Determine the moles of carbon in CO2 by using the molar mass of CO2 (44.01 g/mol) and the fact that each mole of CO2 contains one mole of carbon.
Calculate the moles of hydrogen in H2O by using the molar mass of H2O (18.02 g/mol) and the fact that each mole of H2O contains two moles of hydrogen.
Convert the moles of carbon and hydrogen to a mole ratio by dividing each by the smallest number of moles calculated in the previous steps.
If necessary, multiply the mole ratio by a whole number to obtain the smallest whole number ratio of carbon to hydrogen.
Write the empirical formula using the whole number ratio of carbon to hydrogen.

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주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Combustion Analysis

Combustion analysis is a technique used to determine the composition of a hydrocarbon by burning it in excess oxygen. The products of this reaction are typically carbon dioxide (CO2) and water (H2O). By measuring the masses of these products, one can infer the amounts of carbon and hydrogen in the original hydrocarbon, which is essential for calculating its empirical formula.
추천 영상:
가이드 코스
01:29
Combustion of Non-Hydrocarbons

Empirical Formula

The empirical formula of a compound represents the simplest whole-number ratio of the elements present in that compound. It is derived from the moles of each element calculated from the mass of the products obtained in combustion analysis. This formula is crucial for understanding the basic composition of the hydrocarbon before determining its molecular structure.
추천 영상:
가이드 코스
02:26
Empirical vs Molecular Formula

Mole Concept

The mole concept is a fundamental principle in chemistry that relates the mass of a substance to the number of particles it contains. One mole of any substance contains Avogadro's number (approximately 6.022 x 10^23) of entities, whether atoms, molecules, or ions. In combustion analysis, converting the mass of CO2 and H2O to moles allows for the determination of the number of carbon and hydrogen atoms in the hydrocarbon, which is necessary for calculating the empirical formula.
추천 영상:
가이드 코스
01:25
Mole Concept
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