What is the empirical formula of a compound that contains 0.783 g carbon, 0.196 g hydrogen and 0.521 g oxygen?

Connect the whole numbers on the periodic table to indicate what they represent?

Why is the bottom layer of a trophic pyrimid the

Which of your 24 wells had indications that a chemical reaction occurred? how were you able to tell that a chemical reaction occurred? which of your 24 wells had indications that a physical reaction occurred? how were you able to tell that a physical reaction occurred? report on both mixing and evaporation. make a general statement about whether your hypotheses were validated or rejected. must your hypotheses be correct for this to be a successful laboratory?