# At STP, 1 liter of O_2(g) and 1 liter of Ne(g) have the same what?

Dec 17, 2016

n=(PV)/(RT)=??
Of course, the different gaseous samples, will have different MASSES, in that the mass of a $\text{dioxygen particle}$ is less than the mass of $\text{argon particle}$? What are these masses?