The gram-molecular weight of a molecule or atom has the same number of molecules or atoms which is equal to Avagadro's Number A Primer on Measuring Concentrations – Molarity, Moles and Other Confusing Stuff Post author:Akul Mehta Post published:February 20, 2011 Post category:All Time Favorites/Articles/Notes Continue ReadingA Primer on Measuring Concentrations – Molarity, Moles and Other Confusing Stuff