Please help me ill give brainliest lots of points

What is the name for a substance formed in a chemical reaction

Which organelle breaks down sugar molecules that supply energy to the cell ?

According the inverse square law, doubling the distance from the source of the sound, a speaker, for example, will drop the sound 6 db each time. if you were standing in the back of an auditorium, 32 feet away from a speaker not using any amplification, would you be able to hear a speaker clearly? why or why not?