At what temperature the velocity of sound will x double of the velocity at `10^@C`?

At what temperature the velocity of sound will increase by 10% of its value at 27^@C ?

What is the velocity of sound in vacuum?

At which temperature the r.m.s. velocity will be halved of it at 0^@C ?

With one degree rise of temperature, the velocity of sound will increase by:

At what temperature will the rms velocity of SO_(2) molecules be equal to the rms velocity of O_(2) molecules at 25^(@)C ?

At what temperatures rms velocity, average velocity & most probable velocity of O_(2) molecules will be 1500 m*s^(-1) ?