Bilingual edition: English is preserved and Chinese follows each unit. Terminology uses the confirmed v20260916 glossary; automated semantic review remains traceable. 中英双语版:英文原文完整保留,中文紧随对应单元;术语采用 v20260916 确认表,自动语义审校结果可追溯。
Moles, Moles Equations
摩尔数、摩尔方程
What is a mole?
什么是摩尔?
State the "Law of definite proportions" in terms of moles.