Lesson 2: Moles

Question 1

What is a mole?

Answer 1

6.02 x 10²³ of anything!
(Avagadro’s constant)

Question 2

What is the mass of 1 mole of a subatance equivalent to?

Answer 2

• The mass of 1 mole of a substance, in grams, is the same as its relative formula mass.

Question 3

What is the equation to calculate moles?

Answer 3

Moles = mass/ RFM

Question 4

How can I work out the concentration of a solution using moles?

Answer 4

concentration = moles/ volume
concentration (mol/ dm³ or M)

Question 5

If i use the equation:
concentration = mass/ volume, what is the unit of concentraion?

Answer 5

g/dm³