In a mixture of argon (atomic mass = 39.9 u) and neon (atomic mass = 20.2 u),

Question:

In a mixture of argon (atomic mass = 39.9 u) and neon (atomic mass = 20.2 u), the speed of sound is 363 m/s at 3.00 × 102 K. Assume that both monatomic gases behave as ideal gases. Find the percentage of the atoms that are argon and the percentage that are neon.