Calculations Flashcards
What is the relative atomic mass?
The relative atomic mass is the weighted average mass of the isotopes of an element relative to one atom of carbon atom
What is the relative formula mass (RFM) or relative molecular mass (RMM)?
It’s the weighted average mass of atoms in a compound relative to one atom of carbon
How can you calculate the RFM or RMM?
Add together the individual relative atomic masses of each of the atoms in a compound
How do you calculate the percentage of an element in a compound?
RAM x number of atoms(of that element)
————————————
RFM(of whole compound)
How do you calculate the number of moles?
Mass
———
Mr
What is the empirical formula?
Is the simplest whole number ratio of atoms in a compound
What’s the molecular formula?
It’s the actual number of atoms in a compound
