identify a, x, and y in the unknown compounds ab and xy. if a substance cannot be classified as a, x, or y, classify it as neither a, x, nor y.

How can you use chemical equations to predict the products of the reaction you can carry out?

Light waves travel than sound waves.

The picture represents the process that produces most of the energy used by living organisms on earth. which process is represented in the picture? a) the magnetic attraction between two hydrogen nuclei. b) the fusion of hydrogen nuclei to produce a helium nucleus in the core of the sun. c) the fission of hydrogen nuclei to produce a helium nucleus in the core of the sun. d) the chemical reaction between hydrogen nuclei to produce a helium nucleus in earth's atmosphere.