Question

A 45.2-g sample of Ne gas exerts a certain pressure in a container of fixed volume. What mass of Ar is required to exert half the pressure at the same conditions of volume and temperature?

Answer 1

avogadro's law states that equal moles of gas will occupy equal volumes under equal conditions, so half the pressure will be exerted by half the moles. Find out how many moles of Ne gas you have, and find the right moles of argon, then turn that moles into mass.