Mole Calculations Flashcards
What is relative formula mass?
The sum of atomic masses of atoms in a molecule
How do you calculate the sum of atomic masses?
By adding up the relative atomic mass of all the elements in it
Where do you find relative atomic mass?
The periodic table
What is the sign for relative formula mass
Mr
What is the formula for relative atomic mass?
Ar
What is empirical formula?
The simplest whole number ratio of atoms of each element present in a compound
What does molecular formula do?
Shows the actual number of atoms of each element in a molecule
What is a mole?
A substance that contains the same number of particles. One mole of a substance is either it’s Ar or Mr in grams
What is the equation for moles?
Mass (g) = Mr (RFM) x moles
How do you calculate the percentage yield?
Actual yield / Theoretical yield x 100%
What is a yield?
The mass of useful products obtained from a reaction
