17/01/21 Flashcards
1
Q
What are molecules ?
A
They are atoms joined chemically
2
Q
What are compounds?
A
They are atoms joined chemically but with different elements
3
Q
How do you work out the number of moles?
A
Mass÷Mr
4
Q
How do you find out the Mr ?
A
Mass÷ number of moles
5
Q
How do you find out the mass?
A
Moles x Mr
6
Q
What is Mr ?
A
It is the relative atomic mass
7
Q
What is avogrado’s constant?
A
How many particles/ molecules /compounds there are in one mole of that substance
8
Q
What is the Mr of oxygen
A
16
9
Q
What is the Mr of iron
A
56
10
Q
What is the Mr of carbon
A
12
