3-6:  Molecular formula

  1. Determine the molecular formula of CH2O.  The molecular mass of the compound is 180.1g/mol.

 

 

  1. An organic compound is found to contain 42.9% carbon, 6.4% hydrogen and the remainder of the compound is oxygen.  Determine the molecular formula.  The molecular mass of the compound is 504.4g/mol.

 

 

  1. A compound containing only carbon, hydrogen, and oxygen is found to contain 40.9% carbon and 54.5% oxygen. The molecular mass of the compound is 176.13g/mol.  Determine the molecular formula

 

 

  1. Determine the molecular formula of CH3O. The molecular mass of the compound is 62.07g/mol.