1 What is a Mole? Mole Video. 2 What is a mole? No!! Not that kind of mole! Unit of measure that is...
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Transcript of 1 What is a Mole? Mole Video. 2 What is a mole? No!! Not that kind of mole! Unit of measure that is...
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What is a mole?
No!! Not that kind of mole!
Unit of measure that is important in understanding the relationship between the number of particles in a substance and its’ mass.
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The Mole
No! Not that kind of mole.
A mole (mol) is the amount of a substance that contains as many particles as there are atoms in 12g of C-12.
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Avagadros Number
Avagadro’s number- determined experimentally
6.022 x 1023units = 1 mole
“Units” can be atoms, particles, formula units or molecules
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Check these out!
I have measured exactly 1.00 mol of a bunch of household items. Pass them around.
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Molar Mass
The amount of substance that contains Avogadros number of particles.
Units: grams/mol
Atomic mass (amu) = Molar mass (g/mol)
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The Periodic TableSo, when we look at
the periodic table, we have a bunch of conversion factors that will help us do all sorts of calculations.
Yipee!
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How do I do gram to particle calculations?
Flow chart:
Gram Mole Particle
Using the flow chart, we can solve any of these seemingly difficult
calculations.
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Now let’s take it all the way!
How many atoms in 3.0g of Carbon?
How many grams in 1.2 x 1023 atoms of carbon?
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Molar MassA compound is a collection of atoms that
are chemically bonded together.
Molar mass is the mass in grams of one mole of the compound.
You may also hear this quantity referred to as molecular weight.
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What is the Molar Mass of water?
1. Count how many atoms of each element.
2. Multiply by the atomic mass rounded to the 0.01 place.
3. Add them up!
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