formula weight

简明释义

1. 式量; 2. 化学式量; 3. 分子量; 4. 相对分子质量;

英英释义

例句

1.In chemistry, understanding the formula weight 分子量 helps in stoichiometric calculations.

在化学中，理解formula weight 分子量有助于进行化学计量计算。

2.You can find the formula weight 分子量 of a compound by summing the atomic weights of its constituent elements.

你可以通过将其组成元素的原子量相加来找到化合物的formula weight 分子量。

3.To calculate the molecular formula, we first need to determine the formula weight 分子量 of each element involved.

要计算分子式，我们首先需要确定每个元素的formula weight 分子量。

4.The formula weight 分子量 of water is approximately 18 grams per mole.

水的formula weight 分子量大约是每摩尔18克。

5.The formula weight 分子量 is essential for converting grams to moles in any chemical reaction.

在任何化学反应中，formula weight 分子量对于将克转换为摩尔是必不可少的。

作文

In the field of chemistry, understanding the concept of formula weight is crucial for students and professionals alike. The term formula weight refers to the sum of the atomic weights of all the atoms in a chemical formula. It provides a way to quantify the mass of a substance based on its molecular composition. For instance, the formula weight of water (H2O) can be calculated by adding the atomic weights of two hydrogen atoms and one oxygen atom. Hydrogen has an atomic weight of approximately 1.01 amu (atomic mass units), while oxygen has an atomic weight of about 16.00 amu. Therefore, the formula weight of water is (2 × 1.01) + (1 × 16.00) = 18.02 amu.Understanding formula weight is not only important for academic purposes but also has practical applications in various industries, including pharmaceuticals, food science, and environmental science. In pharmaceuticals, for example, knowing the formula weight of a drug is essential for determining the correct dosage. If a medication is prescribed in milligrams, healthcare professionals must know the formula weight to ensure that patients receive the right amount of active ingredients.Moreover, in food science, the formula weight can help in calculating nutritional information. For instance, when formulating a new product, food scientists must consider the formula weight of each ingredient to accurately label the nutritional content. This ensures that consumers are informed about what they are eating, promoting transparency and safety in food consumption.Environmental scientists also rely on the formula weight to understand the behavior of different substances in nature. For example, when studying pollutants in water or air, scientists must calculate the formula weight of various compounds to assess their impact on health and the environment. By understanding how these compounds interact with biological systems, researchers can develop strategies to mitigate their harmful effects.In addition to its practical applications, the concept of formula weight also serves as a foundation for more advanced topics in chemistry, such as stoichiometry and molarity. Stoichiometry involves using the formula weight to determine the proportions of reactants and products in chemical reactions. This is essential for predicting the outcomes of reactions and for scaling up processes in industrial settings.Furthermore, molarity, which is a measure of concentration, relies on the formula weight to convert between grams of solute and liters of solution. For example, to prepare a 1 M solution of sodium chloride (NaCl), chemists must know the formula weight of NaCl, which is approximately 58.44 g/mol. This knowledge allows them to accurately dissolve the appropriate amount of salt in water to achieve the desired concentration.In conclusion, the concept of formula weight is fundamental in the study and application of chemistry. It serves as a bridge between theoretical knowledge and practical application, enabling students and professionals to solve real-world problems. Whether in pharmaceuticals, food science, or environmental studies, understanding formula weight equips individuals with the necessary tools to make informed decisions and contribute positively to society. As such, mastering this concept is not just an academic exercise; it is a vital skill that has far-reaching implications across various fields of science and industry.

在化学领域，理解分子量的概念对于学生和专业人士来说至关重要。术语分子量是指化学式中所有原子的原子量之和。它提供了一种根据分子组成量化物质质量的方法。例如，水（H2O）的分子量可以通过将两个氢原子和一个氧原子的原子量相加来计算。氢的原子量约为1.01 amu（原子质量单位），而氧的原子量约为16.00 amu。因此，水的分子量为（2 × 1.01）+（1 × 16.00）= 18.02 amu。理解分子量不仅对学术目的重要，而且在制药、食品科学和环境科学等各个行业具有实际应用。例如，在制药领域，了解药物的分子量对于确定正确剂量至关重要。如果药物以毫克为单位开处方，医疗专业人员必须知道分子量以确保患者获得正确的活性成分数量。此外，在食品科学中，分子量可以帮助计算营养信息。例如，在配制新产品时，食品科学家必须考虑每种成分的分子量以准确标注营养成分。这确保了消费者了解他们所吃的东西，促进了食品消费的透明度和安全性。环境科学家也依赖于分子量来了解不同物质在自然界中的行为。例如，在研究水或空气中的污染物时，科学家必须计算各种化合物的分子量以评估其对健康和环境的影响。通过了解这些化合物与生物系统的相互作用，研究人员可以制定减轻其有害影响的策略。除了其实际应用之外，分子量的概念还作为更高级化学主题的基础，例如化学计量学和摩尔浓度。化学计量学涉及使用分子量来确定化学反应中反应物和产品的比例。这对于预测反应结果和在工业环境中放大过程至关重要。此外，摩尔浓度是浓度的一种测量方法，依赖于分子量在克溶质和升溶液之间进行转换。例如，要制备1 M氯化钠（NaCl）溶液，化学家必须知道NaCl的分子量，约为58.44 g/mol。这一知识使他们能够准确地将适量的盐溶解在水中，以达到所需的浓度。总之，分子量的概念在化学的学习和应用中是基础性的。它作为理论知识与实际应用之间的桥梁，使学生和专业人士能够解决现实问题。在制药、食品科学或环境研究中，理解分子量为个人提供了必要的工具，以做出明智的决策并积极为社会做出贡献。因此，掌握这一概念不仅仅是学术练习；它是一项具有深远影响的关键技能，涉及各个科学和工业领域。