Gas is contained in a 6.00-L vessel at a temperature of 21.0°C and a pressure of 8.00 atm. (a) Determine the number of moles of gas in the vessel.   (b) How many molecules are in the vessel?

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Diatomic Gas

Molecule, is a collection of two or more atoms together (which constitute the smallest observable unit) into a pure material. There are some ways to represent the structure of a molecule. Factor symbols represent atoms in Lewis structures, and dots represent electrons that accompany them. A pair of mutual electrons (covalent bond) may be represented by a single dash. The ball-and-stick model depicts the spatial structure of the atoms better.