The science that deals with the study of the stuff that makes up the universe is chemistry? ?

Calculate the mass percent of hydrogen in methyl acetate

The name of the ion, s2-, is: sulfurous ion sulfide ion sulfur ion sulfate ion

In the millikan oil drop experiment they determined that every drop had a charge which was a while number multiple of -1.60x10^-19. if a drop has a total charge of -9.60x10^-19 then how many excess electrons are contained within the drop?