### Present Remotely

Send the link below via email or IM

• Invited audience members will follow you as you navigate and present
• People invited to a presentation do not need a Prezi account
• This link expires 10 minutes after you close the presentation

Do you really want to delete this prezi?

Neither you, nor the coeditors you shared it with will be able to recover it again.

# Moles

No description
by

## Mark Ward

on 15 November 2012

Report abuse

#### Transcript of Moles

What is a Mole? How do we use it? How do we use it? Moles It’s not so easy when I have a strange amount ...

19 1
1 6
12 8
16 12
24 11
23 F Na Mg O Water If one mole of water is 18 grams What would happen if I had 1.8 g of water –
how many moles would that be? 0.1 moles If I had 180g of water – how many moles would that be? 10 moles H O 2 0.55 moles = 18 10 = Relative formula mass Mass of sample = The number
of moles So... the number of moles in 10g of water: The Number of Moles Relative formula mass x Number of moles Mass of sample = Finding the mass So if I had 2.5 moles of ammonia...
what mass of would I have? 3 NH The relative formula mass for ammonia is 14+1+1+1=17 Task Worksheet - work out the masses of a mole. H K 20
40 1
1 19
39 8
16 12
24 11
23 Ca Na Mg O M = 40 moles = 0.25 r M = 56 moles = 0.1 r M = 18 moles = 0.2 r M = 40 moles = 0.005 r M = 56 moles = 0.05 r Mass = 20g Mass = 5.6g Mass = 3.6g Mass = 60g Mass = 42g 12 16 24 12 g 16 g 24 g H 2 O 2 CO 1 + 1 + 16 = 18 12 + 16 + 16 = 44 40 + 16 = 56 18 g 44 g 56 g 1 mole of H atoms (H)
1 mole of H molecules (H )
1 mole of NaOH, 3 moles of NaOH
4 moles of H SO
How many moles in....
44g of CO , 22g of CO , 4.4g of CO
36g of H O, 18g of H O, 180g of H O
98g of H SO 4 2 2 2 2 2 2 2 4 2 2 = 42.5 grams Mass of sample = 2.5 x 17
Full transcript