Derive the simplest whole-number atom ratio (empirical formula) from a percent composition or mass data.
输入最多三种元素的质量百分比与原子量,自动求原子数之比并约简。
| Item | Formula / Note | Source / Standard |
|---|---|---|
| Amount of substance | n = m / M, where M is the molar mass of the element | IUPAC, Compendium of Chemical Terminology (Gold Book) |
| Simplest whole-number ratio | Divide every amount by the smallest value, then convert to the simplest integer ratio | Atkins PW, de Paula J, Physical Chemistry, stoichiometric treatment |
| Empirical versus molecular formula | Molecular formula = (empirical formula)_k, where k = M(molecule)/M(empirical) | IUPAC, Compendium of Chemical Terminology (Gold Book) |
| From percent composition | Assume a 100 g sample so each mass percent is numerically the mass in grams | Atkins PW, de Paula J, Physical Chemistry |
适用于化合物组成分析:由元素质量分数(元素分析仪数据)换算原子最简整数比、估算实验式并进一步推导分子式、有机与无机化学教学中的组成计算练习。