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🧪 摩尔浓度计算器Molarity Calculator
由溶质质量、摩尔质量和溶液体积计算摩尔浓度（mol/L），或反算配制所需溶质质量。Calculate molarity (mol/L) from solute mass, molar mass and solution volume, or the mass needed for a target concentration.
使用说明与常见问题How-to & FAQ
「摩尔浓度计算器」是什么？What is the Molarity Calculator tool?
由溶质质量、摩尔质量和溶液体积计算摩尔浓度（mol/L），或反算配制所需溶质质量。Calculate molarity (mol/L) from solute mass, molar mass and solution volume, or the mass needed for a target concentration.
如何使用「摩尔浓度计算器」？How do I use the Molarity Calculator tool?
在「摩尔浓度计算器」中，填写「计算」、「溶质质量 (g)」、「摩尔质量 (g/mol)」、「溶液体积」、「体积单位」等参数，结果会随输入实时计算并显示在下方。In the Molarity Calculator: Fill in "Solve for", "Solute mass (g)", "Molar mass (g/mol)", "Solution volume", "Volume unit"; results are recalculated instantly as you type.
摩尔浓度和质量摩尔浓度有什么区别？Molarity vs molality?
摩尔浓度（M）= 溶质物质的量 ÷ 溶液体积（L）；质量摩尔浓度（m）= 物质的量 ÷ 溶剂质量（kg），后者不随温度变化。Molarity (M) is moles per liter of solution; molality (m) is moles per kilogram of solvent and does not change with temperature.
计算结果可以用于作业或工程吗？Can I use the results for homework or engineering?
「摩尔浓度计算器」使用教科书标准公式（公式写在说明和常见问题中），适合学习和估算核对；涉及安全的工程设计请以规范和实测为准。The Molarity Calculator uses standard textbook formulas (given in the description and FAQ), which is good for learning and checking estimates; for safety-critical engineering follow codes and measured values.
「摩尔浓度计算器」免费吗？需要注册吗？Is the Molarity Calculator free? Do I need an account?
「摩尔浓度计算器」完全免费，无需注册或安装，打开网页即可使用，手机和电脑都能用；输入的内容只在你的浏览器本地处理。The Molarity Calculator is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.