Given: mN2 = 28 g, mHe = 8 g, mNe = 40 g, PTotal = 20 bar
To find: Partial pressure of each gas Formula: P1 = x1 × PTotal
Calculation: Determine the number of moles (n) of each gas using the formula: n = \(\frac{m}M\) Determine the mole fraction of each gas using the formula:

Similarly, XNe = \(\frac25\)
Calculate the partial pressure of each gas:

The partial pressure of nitrogen, helium and neon are 4 bar, 8 bar and 8 bar respectively.