Which of the following fundamental mathematical expressions defining the Mole Concept are scientific — Mole Concept and Some Basic Concepts of Chemistry Chemistry Question

💡 Solution & Explanation

All expressions are derived from the central definition of the mole. (A) Molar mass ($M_w$) is the mass of Avogadro's number ($N_A$) of molecules, each weighing $m$. So $M_w = m \times N_A$. (B) Total molecules ($N$) equals moles ($n$) times Avogadro's number ($N_A$). (C) Rearrangement of B. (D) Rearrangement of A: mass of one molecule ($m$) equals molar mass ($M_w$) divided by Avogadro's number ($N_A$).