Section 11 - The Mole

Question 1

Why is the mole used?

Answer 1

If you had a sample of a substance, and you wanted to count the number of atoms that were in it, you’d have to use some very big numbers, and spend a very long time counting. So you need a unit to describe the amount of a substance that you have - that unit is the mole.

Question 2

One mole of a substance contains _____________ particles

Answer 2

6.02 x 10 ^23

Question 3

One mole of atoms or molecules has a mass in grams ______ to the _________ _________ _____ of that substance

Answer 3

equal, relative formula mass

Question 4

What is the equation to find out how many moles of a substance you have?

Answer 4

Mass of substance/Relative formula mass