The formula unit mass of a substance is the :

  1. The sum of atomic masses of all atoms in a formula unit of a compound
  2. Relative atomic masses of atoms
  3. Equal to the numerical value of the atomic masses
  4. None of the above

 

Answer

  1. The sum of atomic masses of all atoms in a formula unit of a compound

 

Explanation: Formula Unit Mass is the sum of atomic mass of all atoms in formula unit of compound.

It is used for those substances whose constituent element is ions  

(it is used for ionic compounds not molecules)

  1. Class 9
  2. Chapter 3 Class 9 - Atoms And Molecules (Term 2)

About the Author

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CA Maninder Singh
CA Maninder Singh is a Chartered Accountant for the past 11 years and a teacher from the past 11 years. He teaches Science, Accounts and English at Teachoo