Alright someone explain this to me please.
A 1.15 g sample of Ne is combined together with an unweighed sample of Ar (in an initially evacuated vessel.) The partial pressure of Ne in the vessel is 695 torr, and the partial pressure of Ar in the vessel is 515 torr. Find the number of moles of Ar in the vessel, (assuming that Ne and Ar are only two gases in the vessel.) I know the answer is .0422 mol Ar, but I don't know how to get to that. Could someone help a girl out?











