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Using Conversion Factors PowerPoint PPT Presentation


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Using Conversion Factors. a mole also represents an amount of something. It is 6.02 x 10 of something. A mole can represent 6.02 x 10 donuts, iguanas, toes, etc. In chemistry , it is normally used to represent an amount of atoms, ions, molecules, or formula units.

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Using Conversion Factors

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Using conversion factors

Using

Conversion

Factors


Using conversion factors

a mole also represents an amount of something.

It is 6.02 x 10 of something. A mole can

represent 6.02 x 10 donuts, iguanas, toes, etc.

In chemistry, it is normally used to represent

an amount of atoms, ions, molecules, or formula

units.

Collectively, atoms, ions, molecules, or formula

units are called representative particles.

23

23

Just like a dozen represents 12 of something,

such as donuts, iguanas, chemistry assignments, etc.,


Using conversion factors

Because chemists deal with such

large amounts of particles,

it is easier to work with moles of particles


Using conversion factors

amounts of particles can be expressed

not only as moles,

but as mass (grams),

as volume (liters), and

as individual particles (atoms, molecules,

ions, formula units, etc.)


Using conversion factors

O

H

H

a measurement of a sample

of a molecule, H2O for example,

can be converted

from mass

to moles

to particles

to volume

and back again

to any unit of measurement desired


Using conversion factors

this is so cool!!

using

the right

conversion

factors


Using conversion factors

35 g Al


Using conversion factors

35 g Al

? moles Al


Using conversion factors

1 mol

35 g Al x

27 g


Using conversion factors

1 mol

35 g Al x

27 g

35 g Al x 1 mol

27g

=


Using conversion factors

=

1.3 mols Al

1 mol

35 g Al x

27 g

35 mol Al

27

=


Using conversion factors

? mass SiO2

0.8 moles SiO2


Using conversion factors

? mass SiO2

0.8 moles SiO2


Using conversion factors

60.1 g SiO2

1 mole SiO2

0.8 moles SiO2x

= 0.8 x 60.1 g SiO2

= 48.1 g SiO2


Using conversion factors

200 g N2O

? molecules N2O


Using conversion factors

200 g N2O

? molecules N2O


Using conversion factors

23

1 mole N2O 6.02 x 10 molecules N2O

44.0 g N2O 1 mole N2O

this is so cool!!

200 g N2O x x

23

200 x 6.02 x 10 molecules N2O

44.0

=

24

= 2.74 x 10 molecules N2O


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