What type of chemical reaction occurs when beryllium (Be) combines with oxygen (O2) to form beryllium oxide (Beo)?

Sounds propagates through some kind of medium. usually it's air, but it goes just as well through solid objects like walls, windows etc. a soundwave will compress the (air)molecules in front of it, and if this increased density wave hits your ears, you register it as sound. solid objects like walls are a lot denser than air, this means that they will damp a wave, but also carry it easier.

The planets go around the sun..

The answer is b, i got it right on a test. hope it ; )

Ithink is ten(10) %