Relative formula mass refers to what?

Relative formula mass refers to the weighted mean mass of a formula unit compared to 1/12 of the mass of carbon-12. This concept is fundamental in chemistry because it allows chemists to compare the masses of different substances using a standard reference.

When calculating the relative formula mass, you take into account the atomic masses of all the elements present in a compound as indicated by its formula. These atomic masses are typically found on the periodic table and are relative to carbon-12, which is universally accepted as the standard for measuring atomic and molecular masses.

This choice accurately represents how relative formula mass is defined and used in calculations, ensuring that it can be universally understood and applied across different compounds and scientific contexts. Thus, the answer highlights the essential relationship between atomic mass units and how they are utilized to express the mass of a substance in relation to a standard reference.