calculate the mass of O in 4.36 g of Cl 2o7?

1 Answer

• Atomic weight of oxygen: 15.999, so 7 atoms = 111.993

  Atomic weight of chlorine: 35.45, so 2 atoms = 70.9

  So one molecule of Cl2O7 weighs 111.993 + 70.9 = 182.893

  Answer: (111.993 / 182.893) * 4.36

  =~ 2.6698095607814405143991295456906 g