Posted by Tanner on .
What pressure would be required for neon at 25 degrees C to have the same density as argon at 25 degress C and 1.00 atm?

chemistry 
DrBob222,
P*molar mass = density*RT
Plug in the numbers Ar and solve for d Ar. Then use the same formula, change to Ne, plug in d and the other numbers and solve for P.