PLS HELP: CHEMISTRY
How many C8H18 molecules are in 0.83 mL of
C8H18, the mass of which is 0.68 g?
Answer in units of molec.

What are the similarities of physical and chemical change ?

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.

What is the correct lewis dot structure for arsenic?