percentage composition

简明释义

结构百分率

英英释义

例句

1.To find the percentage composition 百分比成分, divide the mass of each element by the total mass.

要找出百分比成分，将每个元素的质量除以总质量。

2.The percentage composition 百分比成分 of water is 11.19% hydrogen and 88.81% oxygen.

水的百分比成分是11.19%的氢和88.81%的氧。

3.The percentage composition 百分比成分 of a solution can affect its boiling point.

溶液的百分比成分可以影响其沸点。

4.Calculating the percentage composition 百分比成分 helps in understanding the material's properties.

计算百分比成分有助于理解材料的特性。

5.In chemistry class, we learned about the percentage composition 百分比成分 of various compounds.

在化学课上，我们学习了各种化合物的百分比成分。

作文

Understanding the concept of percentage composition is essential in various fields, especially in chemistry and materials science. The term percentage composition refers to the relative amount of each element within a compound or mixture, expressed as a percentage of the total mass. This concept not only helps chemists identify the proportions of elements in a substance but also allows for the calculation of empirical formulas and molecular weights. In this essay, I will explore the significance of percentage composition in both academic and practical applications.In chemistry, the percentage composition of a compound provides crucial information about its structure and properties. For instance, when analyzing a chemical formula, knowing the percentage composition can help predict how the compound will react with other substances. Take water (H2O) as an example. The percentage composition of hydrogen in water is approximately 11.2%, while oxygen accounts for about 88.8%. Understanding these proportions is vital for calculations involving stoichiometry, which is the study of the quantitative relationships between reactants and products in a chemical reaction.Moreover, percentage composition is not limited to pure substances; it is also applicable to mixtures. For instance, in the field of materials science, engineers often need to determine the percentage composition of different components in alloys to ensure they possess the desired mechanical properties. An alloy's strength, ductility, and resistance to corrosion can all be influenced by its percentage composition. Therefore, accurate measurements are crucial for developing materials that meet specific performance criteria.In addition to its importance in science and engineering, the concept of percentage composition finds relevance in everyday life, particularly in nutrition. Food labels often provide information on the percentage composition of macronutrients such as carbohydrates, proteins, and fats. Understanding the percentage composition of these nutrients can help individuals make informed dietary choices. For example, if a person wants to increase their protein intake, they can look for foods with a higher percentage composition of protein.Furthermore, the percentage composition of elements can also play a role in environmental science. Scientists may analyze the percentage composition of pollutants in air or water samples to assess environmental health. By determining the percentage composition of harmful substances, researchers can develop strategies to mitigate pollution and protect ecosystems.In conclusion, the concept of percentage composition is fundamental across various disciplines, from chemistry and materials science to nutrition and environmental science. It allows for a deeper understanding of the relationships between different elements and compounds, enabling scientists and engineers to make informed decisions based on precise data. As we continue to explore and innovate in these fields, mastering the concept of percentage composition will remain an essential skill for students and professionals alike. By recognizing its significance, we can better appreciate the intricate balance of elements that compose the world around us.

理解百分比组成的概念在各个领域尤其是化学和材料科学中至关重要。术语百分比组成指的是在化合物或混合物中每种元素的相对含量，以总质量的百分比表示。这个概念不仅帮助化学家识别物质中元素的比例，还可以用于计算经验式和分子量。在这篇文章中，我将探讨百分比组成在学术和实际应用中的重要性。在化学中，化合物的百分比组成提供了关于其结构和性质的重要信息。例如，在分析化学式时，了解百分比组成可以帮助预测化合物与其他物质的反应方式。以水（H2O）为例，水中氢的百分比组成约为11.2%，而氧的百分比组成约为88.8%。了解这些比例对于涉及化学反应中反应物和产品之间定量关系的化学计量学计算至关重要。此外，百分比组成不仅限于纯物质；它也适用于混合物。例如，在材料科学领域，工程师通常需要确定合金中不同成分的百分比组成，以确保它们具有所需的机械性能。合金的强度、延展性和耐腐蚀性都可能受其百分比组成的影响。因此，准确的测量对于开发满足特定性能标准的材料至关重要。除了在科学和工程中的重要性之外，百分比组成的概念在日常生活中也具有相关性，特别是在营养方面。食品标签通常提供宏量营养素如碳水化合物、蛋白质和脂肪的百分比组成信息。了解这些营养素的百分比组成可以帮助个人做出明智的饮食选择。例如，如果一个人想增加蛋白质摄入，他们可以寻找百分比组成较高的蛋白质食品。此外，元素的百分比组成在环境科学中也可能发挥作用。科学家可能会分析空气或水样本中污染物的百分比组成以评估环境健康。通过确定有害物质的百分比组成，研究人员可以制定减轻污染和保护生态系统的策略。总之，百分比组成的概念在化学、材料科学、营养和环境科学等各个学科中都是基础。它使我们能够更深入地理解不同元素和化合物之间的关系，使科学家和工程师能够基于精确数据做出明智的决策。随着我们在这些领域的持续探索和创新，掌握百分比组成的概念仍将是学生和专业人士的基本技能。通过认识到它的重要性，我们可以更好地欣赏构成我们周围世界的元素之间的复杂平衡。