Gas is contained in a n 8L vessel at a temperature of 20¡ãC and a pressure of 9atm. a)Determine the number of moles of gas in the vessel. b) How many molecules are there in the vessel?

Answer 1

a. Use PV = nRT and solve for n. Remember T must be in kelvin.
b. Can't be done without knowing more information. If the gas is monatomic then b is the same as a.
If the gas is diatomic, then b is 1/2 a. If it is triatomic, then b is 1/3 a.