You have a 10 ml solution with an initial concentration of 40g/ml perform a 1:5 dilution four times what is the concentration of tube 4 please help

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.

not sure if this what   you'r looking for would be percent composition

mathematical model hope this