The Mole Concept

Question 1

What is relative atomic mass? (RAM)

Answer 1

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

Question 2

What is Relative molecular mass? (RMM)

Answer 2

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

Question 3

What is Relative formula mass?

Answer 3

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

Question 4

What is a mole?

Answer 4

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

Question 5

What is molar mass?

Answer 5

The molar mass is the mass ,in grams, of one mole of a substance. Its units are g mol^-1

Question 6

How do you calculate the molar mass?

Answer 6

The molar mass of an element or compound is the relative atomic, molecular or formula mass amount expressed in grams per mole

Question 7

Any gas at r.t.p will occupy a volume of….

Answer 7

24dm^3 or 24,000 cm^3

Question 8

Any gas at s.t.p will occupy a volume of…

Answer 8

22.4dm^3 or 22,400cm^3