Answer: So for helium the equation above gives v= 973 m/s at STP, and 1,020 m/s at 298 K. Since the speed, frequency and length of a sound wave are related by the equation ν = v/λ, the frequency of a sound produced by a resonator of a particular length is proportional to the speed of sound in the particular gas that fills the resonator. For air at STP (0 °C and 1 atm), γ = 1.40, and v= √((1.40 × 8.314 J/mol·K ×273.16 K)/(2.8967 × 10-2kg/mol)) = 331 m/s.
Step-by-step explanation: I think this is right I'm not the best but hope it helps!