বাষ্পীভৱনবাস
বাষ্পীয় ঘনত্ব (Assamese)
বাষ্পীয় ঘনত্ব (Assamese)
1. ChemistryVapour density is the density of a vapour in relation to that of hydrogen. It may be defined as mass of a certain volume of a substance divided by mass of same volume of hydrogen.
vapour density = mass... from wikipedia.org