Select all the correct answers. Which sentences describe an advantage of using a hydrogen fuel cell instead of burning fossil fuels?

What is the density of the black hole

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.

Which of the following molecules is polar? c3h7oh c2h5cooh