Predict the chemical formula of butyne, having one carbon-carbon triple bond. c4h8 c4h10 c4h6

What are two reasons for why a species might disappear from the fossil record?

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?

What factors contribute to the effect an environmental toxin has on the human body?