Review of the Mole Week 1

A mole is the SI unit for amount of substance

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​1 mol = 6.022 x 10²³ things

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Just like 1 dozen = 12 things

What is a mole?​

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How many atoms of zinc are found in 2.5 moles of zinc?

1 mol = 6.022 x 10²³ atoms

Yes we are doing math stop screaming

Convert 2.5 x 10²⁴ ions of sodium to moles of sodium

1 mol = 6.022 x 10²³ ions

Yes we are doing math stop screaming

How many oxygen atoms are in 1.8 moles CO₂ molecules?

1 mol = 6.022 x 10²³ ions

Yes we are doing math stop screaming

One mole of carbon atoms does not weigh the same as one mole of copper atoms.

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Why? Because each atom has a unique molar mass

What about mass?

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Molar mass of an element is equal to the atomic mass of an element but its units are g/mol (grams per mole)

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What's the molar mass of oxygen? magnsium?

Molar Mass of Elements

1 mole = Molar Mass (grams) of an Element

How many moles of calcium are in 525 grams of calcium?

Don't forget units!

We can use two steps to convert between mass and particles

​How many atoms of gold are in a 25.0g solid gold nugget?