1. The speed of sound in air is approximately 331.5 m/s at 0 °C or around 1200 km per hour

Explanation:

The speed of sound through air is approximately 343 m/s at normal room temperature, which is at 20 °C. The speed of sound through air is 346 m/s at 25 °C.

2. In a given ideal gas the speed of sound depends only on its temperature. Celsius is c = 331.3 m/s.

3. 386 m/s

For example, the speed of sound in air is 386 m/s at 100 °C. The sound of speed in air is increased by 0.60 m/s for each increase of degree in air temperature. The speed of sound is faster at higher temperatures because molecules collide more often.