The Mole Concept Flashcards
What is relative atomic mass? (RAM)
The relative atomic mass, Ar, is the average mass of one atom of an element compared to one-twelfth the mass of an atom of carbon- 12. IT HAS NO UNITS
What is Relative molecular mass? (RMM)
Relative molecular mass, Mr, is the average mass of one molecule of an element or compound compared to one- twelfth the mass of an atom of carbon - 12. IT HAS NO UNTS
What is Relative formula mass?
Relative formula mass is used to compare the mass of a formula unit of an ionic compound with one - twelfth the mass of a carbon -12 atom. IT HAS NO UNITS
What is a mole?
A mole is the amount of a substance that contains the same number of particles as there are atoms in 12 grams of carbon - 12
What is molar mass?
The molar mass is the mass ,in grams, of one mole of a substance. Its units are g mol^-1
How do you calculate the molar mass?
The molar mass of an element or compound is the relative atomic, molecular or formula mass amount expressed in grams per mole
Any gas at r.t.p will occupy a volume of….
24dm^3 or 24,000 cm^3
Any gas at s.t.p will occupy a volume of…
22.4dm^3 or 22,400cm^3