What ratio by mass of 'Ne' and CH ₄ should be mixed so that partial pressure exerted by each gas is same?

Step-by-step solution

Let the mass of Ne be w₁ and the mass of CH ₄ be w₂ . Molar mass of Ne = 20 g/mol Molar mass of CH ₄ = 16 g/mol Number of moles of Ne, n_ Ne = w₁ 20 Number of moles of CH ₄ , n_ CH ₄ = w₂ 16 According to Dalton's law of partial pressures, the partial pressure of a gas in a mixture is directly proportional to its number of moles. Since the partial pressures of both gases are equal, their number of moles must be equal. n_ Ne = n_ CH ₄ w₁ 20 = w₂ 16 w₁ w₂ = 20 16 = 5 4 The required ratio by mass is 5:4 . Answer: 5:4