4. (J1-2010S-22) A compound contains only carbon, hydrogen, oxygen. Analysis gives H= 9.43%, C=45.28%.(a) Find the empirical formula of the compound. (b) If
the molar mass of the compound is -318 g/mole, what is the molecular formula?

Achemist 16 drop copper metal from copper chloride solution. the chemist place is 0.50 g of aluminum foil in a solution containing 0.75 g of copper (ii) chloride. a single replacement reaction takes place. which statement explains the maximum amount of copper that the chemist can extract using this reaction?