Relative formula mass

Cards (7)

  • Molecular formula shows the number of atoms of each element present in one molecule of a compound.
  • Relative molecular mass (Mr) = sum of relative atomic masses of atoms present
  • The relative atomic mass is the weighted average of all naturally occurring isotopes.
  • Relative Formula Mass (RFM) is calculated by adding up the atomic masses of all elements in the molecular formula, multiplied by their coefficients.
  • The RFM can be used to calculate the molar mass of a substance from its relative formula mass.
  • Average Atomic Mass (AM): The average mass of an atom of an element based on the abundance of different isotopes.
  • The relative molecular mass is calculated by adding up the relative atomic masses of all the elements present in the compound, using their coefficients from the chemical equation.