mass formula

简明释义

质量公式

英英释义

例句

1.The mass formula is essential for understanding the relationship between mass and energy.

了解质量与能量之间关系的关键是质量公式。

2.Students learned how to apply the mass formula in their physics class.

学生们在物理课上学习如何应用质量公式。

3.In chemistry, the mass formula helps determine the molar mass of compounds.

在化学中，质量公式有助于确定化合物的摩尔质量。

4.The physicist derived the mass formula to calculate the energy of particles.

物理学家推导了质量公式来计算粒子的能量。

5.Using the mass formula, we can find the weight of an object in different gravitational fields.

使用质量公式，我们可以找到物体在不同重力场中的重量。

作文

In the realm of physics and chemistry, the term mass formula refers to a mathematical expression that represents the mass of a substance based on its molecular or atomic composition. Understanding the mass formula is crucial for scientists and students alike, as it lays the groundwork for various applications in both fields. The mass formula not only helps in determining the mass of a compound but also plays a significant role in stoichiometry, which is the calculation of reactants and products in chemical reactions. To illustrate the importance of the mass formula, let’s consider water, which has the chemical formula H₂O. The mass formula for water can be derived by adding the atomic masses of its constituent elements: hydrogen (H) and oxygen (O). Each hydrogen atom has an approximate mass of 1 gram per mole, and since there are two hydrogen atoms in water, their total mass contributes 2 grams per mole. The oxygen atom has a mass of about 16 grams per mole. Therefore, the mass formula for water can be expressed as follows: Mass of H₂O = (2 × 1 g/mol) + (1 × 16 g/mol) = 18 g/mol.This calculation is fundamental in various scientific experiments, especially when dealing with reactions involving water. When we understand the mass formula, we can accurately predict how much water will be produced or consumed in a chemical reaction. Moreover, the mass formula is not limited to simple compounds like water. It extends to more complex molecules such as glucose (C₆H₁₂O₆). To find the mass formula for glucose, we again sum the atomic masses of carbon (C), hydrogen (H), and oxygen (O). Carbon has an approximate mass of 12 grams per mole, hydrogen has 1 gram per mole, and oxygen has 16 grams per mole. Thus, the mass formula for glucose would be calculated as follows: Mass of C₆H₁₂O₆ = (6 × 12 g/mol) + (12 × 1 g/mol) + (6 × 16 g/mol) = 180 g/mol.Knowing the mass formula for glucose is essential in biological sciences, particularly in understanding cellular respiration and photosynthesis. These processes are vital for life, and knowing the exact mass of glucose involved allows scientists to calculate energy production and consumption in living organisms. Furthermore, the mass formula aids in the synthesis of new compounds in laboratories. Researchers often rely on the mass formula to create specific ratios of reactants, ensuring that chemical reactions proceed efficiently. For instance, in pharmaceuticals, the precise measurement of substances based on their mass formula can determine the effectiveness and safety of medications. In conclusion, the mass formula serves as a foundational concept in both chemistry and physics, enabling researchers and students to perform accurate calculations related to the mass of substances. Whether it is for simple compounds like water or complex organic molecules like glucose, the mass formula is indispensable in various scientific applications. Its significance cannot be overstated, as it not only facilitates our understanding of chemical reactions but also contributes to advancements in technology and medicine. Mastering the mass formula is thus an essential skill for anyone pursuing a career in the sciences.

在物理和化学领域，术语质量公式指的是一个数学表达式，它基于物质的分子或原子组成来表示物质的质量。理解质量公式对科学家和学生来说至关重要，因为它为这两个领域的各种应用奠定了基础。质量公式不仅有助于确定化合物的质量，而且在化学反应中的反应物和产品计算中也起着重要作用，即化学计量学。为了说明质量公式的重要性，让我们考虑水，它的化学式是H₂O。水的质量公式可以通过加上其组成元素的原子质量来推导：氢（H）和氧（O）。每个氢原子的质量约为每摩尔1克，由于水中有两个氢原子，因此它们的总质量贡献了每摩尔2克。氧原子的质量约为每摩尔16克。因此，水的质量公式可以表达如下：H₂O的质量 = (2 × 1 g/mol) + (1 × 16 g/mol) = 18 g/mol。这一计算在各种科学实验中是基础，尤其是在涉及水的反应时。当我们理解质量公式时，我们可以准确预测在化学反应中将产生或消耗多少水。此外，质量公式并不限于像水这样简单的化合物。它扩展到更复杂的分子，如葡萄糖（C₆H₁₂O₆）。要找出葡萄糖的质量公式，我们再次求和碳（C）、氢（H）和氧（O）的原子质量。碳的质量约为每摩尔12克，氢为每摩尔1克，氧为每摩尔16克。因此，葡萄糖的质量公式可以计算如下：C₆H₁₂O₆的质量 = (6 × 12 g/mol) + (12 × 1 g/mol) + (6 × 16 g/mol) = 180 g/mol。了解葡萄糖的质量公式在生物科学中至关重要，特别是在理解细胞呼吸和光合作用方面。这些过程对生命至关重要，知道参与的葡萄糖的确切质量使科学家能够计算生物体内的能量产生和消耗。此外，质量公式有助于实验室中新化合物的合成。研究人员通常依靠质量公式来创建反应物的特定比例，以确保化学反应的高效进行。例如，在制药行业，根据其质量公式精确测量物质可以决定药物的有效性和安全性。总之，质量公式作为化学和物理学中的基础概念，使研究人员和学生能够进行与物质质量相关的准确计算。无论是简单的化合物如水，还是复杂的有机分子如葡萄糖，质量公式在各种科学应用中都是不可或缺的。它的重要性不容低估，因为它不仅促进了我们对化学反应的理解，还为技术和医学的进步做出了贡献。因此，掌握质量公式对于任何追求科学事业的人来说都是一项必不可少的技能。