Question

Relative formula mass

Answer 1

The standard Ar value of each element is the average relative atomic mass, which takes all isotopes of each element into account. The mass of a molecule is called the relative formula mass (Mr). This is calculated by adding up the relative atomic mass and then add these together.

Answer 2

Relative formula masses can be calculated and used in conservation of mass calculations. Calculations can be carried out to find out concentrations of solution and uncertainties in measurements.