This presentation is the property of its rightful owner.
1 / 9

# Mole Calculations 1 PowerPoint PPT Presentation

Mole Calculations 1. Chemical Calculations. Atoms and molecules are extremely small. If they are so small and so light, how can we weigh them?. We weigh large numbers of them. 1.00 g H = 6.02 x 10 23 atoms = 1.00 mole This is called Avogadro’s number.

Mole Calculations 1

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

### Mole Calculations 1

Chemical Calculations

Atoms and molecules are extremely small.

If they are so small and so light, how can we weigh them?

We weigh large numbers of them.

1.00 g H = 6.02 x 1023 atoms = 1.00 mole

1 dozen donuts = 12 donuts

1 century = 100 years

1 millennium = 1000 years

1.00 mole= 6.02 x 1023 particles

TThe mole is a large number of particles

pparticle

AatomelementCu 6.02 x 1023 atoms/mole

MmoleculecovalentCH4 6.02 x 1023 molecules/mole

FFormula UnitionicNaCl 6.02 x 1023 FUs/mole

1. Convert 2.5 x 1025 at C to moles

2.5 x 1025 at C

x 1 mole

= 42 moles C

6.02 x 1023 at C

2. Convert 16.3 moles CO2 to molecules

16.3 moles

x 6.02 x 1023 molecules

= 9.81 x 1024 molecules

1mole

3. Convert 8.9 x 1024 molecules CO2 to moles

x 1 mole

8.9 x 1024 molecules

= 15 moles CO2

6.02 x 1023 molecules

4. Convert 28 moles NaCl to Formula Units

x 6.02 x 1023 FU

28 moles

= 1.7 x 1025 FUs

1mole