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Ch.3 - Chemical Reactions and Reaction Stoichiometry
Brown - Chemistry: The Central Science 14th Edition
Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232당신이 사용하는 게 아니라요?교과서 변경
모든 교과서Brown 14th EditionCh.3 - Chemical Reactions and Reaction Stoichiometry문제 25e
3장, 문제 25e

Calculate the percentage by mass of oxygen in the following compounds: (e) dioxin, C12H4Cl4O2

검증된 단계별 안내
1
Identify the molar mass of each element in the compound. For dioxin (C12H4Cl4O2), the elements are carbon (C), hydrogen (H), chlorine (Cl), and oxygen (O). The atomic masses are approximately: Carbon = 12.01 g/mol, Hydrogen = 1.01 g/mol, Chlorine = 35.45 g/mol, Oxygen = 16.00 g/mol.
Calculate the molar mass of the compound by multiplying the atomic mass of each element by the number of atoms of that element in the formula and then summing these values. For dioxin, this would be: (12.01 g/mol * 12) + (1.01 g/mol * 4) + (35.45 g/mol * 4) + (16.00 g/mol * 2).
Calculate the total mass of oxygen in the compound by multiplying the atomic mass of oxygen by the number of oxygen atoms in the formula: 16.00 g/mol * 2.
Determine the percentage by mass of oxygen in the compound using the formula: (mass of oxygen / molar mass of compound) * 100%.
This percentage represents the mass fraction of oxygen in dioxin, expressed as a percentage.

비슷한 문제에 대한 검증된 영상 답변:

이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.
영상 길이:
2m

주요 개념

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

Molar Mass Calculation

Molar mass is the mass of one mole of a substance, calculated by summing the atomic masses of all atoms in its chemical formula. For dioxin (C12H4Cl4O2), you would multiply the number of each type of atom by its respective atomic mass from the periodic table and then add these values together to find the total molar mass.
추천 영상:
가이드 코스
03:12
Molar Mass Calculation Example

Percentage by Mass

Percentage by mass is a way to express the concentration of a component in a compound. It is calculated by dividing the mass of the component (in this case, oxygen) by the total molar mass of the compound, then multiplying by 100 to convert it to a percentage. This helps in understanding the composition of the compound.
추천 영상:
가이드 코스
00:38
Mass Percent Calculation

Chemical Composition

Chemical composition refers to the types and amounts of elements that make up a compound. In dioxin, the presence of carbon, hydrogen, chlorine, and oxygen indicates its structure and properties. Understanding the composition is essential for calculating the mass percentage of specific elements, such as oxygen, in the compound.
추천 영상:
가이드 코스
04:19
Matter Composition
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