MONTREAL SEPTEMBER FESTIVALS & Montreal EVENTS. Home | Accommodations | Attractions | Restaurants | Shopping & Services | Nightlife | Discover Areas | Site Map | What's New | About Us | Contact Us | Photography Credit | Advertise With Us | Terms Of Use| FranÃ§ais.
From Wikipedia, the free encyclopedia. Vapor 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. vapor density = mass of n molecules of gas / mass of n molecules of hydrogen. Therefore: vapour density = molar mass of gas / molar mass of H 2.
The transition of a substance directly from the solid to the gas phase without passing through a liquid phase. Density (g cmâ3) Density is the mass of a substance that would fill 1 cm3 at room temperature. Relative atomic mass. The mass of an atom relative to that of carbon-12. This is approximately the sum of the number of protons and neutrons in the nucleus.