THIS IS FOR CHEM PLEASE ASNWER ASAP

3. A sheet of metal is 54.6 mm wide and 23.7 mm long. If it weighs 5.719 g and the density of the metal is 19.3 g/cm3 , what is the thickness of the sheet (in mm)?

4. If PV = [gR(T+273.15)]/M, solve for M when P = 333, V = 0.244, g = 0.314, R = 62.37, and T = 35.

5. An ore contains 36.9 % of the mineral cuprite, Cu2O, which is a source of the element Cu. How much ore must be processed in order to obtain 31.0 kg of Cu?

6. A piece of tin wire has a diameter of 0.487 mm. If tin has a density of 7.28 g/cc, how long (in meters) should you cut a piece of wire to obtain 0.0195 moles of tin?