Question

72. Polyethylene is a hydrocarbon polymer used to produce food-storage bags and many other flexible plastic items. A combustion analysis of a 0.00125-g sample of polyethylene yields 0.00394 g of CO, and 0.00161 g of H2O. What is the empirical formula of polyethylene?

Answer 1

Answer cinco2 and H in H₂O comes from polyethylene Molar mass of co₂ = 49.01 g/mol Molar mass of H₂O = 18.02 g/mol number of moles mass molar mass : 0.00394 g of CO2= – - 0.00399 moles of co2 44.01 - 8.95 x 105 moles of con 1 mol of co2 contains 1 mol of c. 8.95X105 moles of co2 contain 8.95x10's moles of c. - 0.00161 g of H₂O = 0.00161 moles of H₂O 18.02 = 8.93x105 moles of H₂O 1 mol of H₂O contains 2 moles of H. 8.93x105 mol of H₂O contain (2x8.93x10 5 moles of th or 1.786x 10 t moles of H moles of c: moles of H = (8.95x105): (1.786x109) (2.786x109) 1: (8.958 105) = 1:2 5o empirical formula of polyethylene is (CH2