LECTURE 4.2 – THE MOLE.

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Presentation transcript:

LECTURE 4.2 – THE MOLE

Today’s Learning Targets LT 3.4 – I can discuss the concept of a mole, the number that it represents, and how the overall size of it can vary between substances

What is the mole?

I. The Mole In any substance there are trillions of atoms We need a simple way of conveying large numbers The mole is a unit that describes the amount of particles that a substance has. Contained within one mole is 6.022 x 1023 particles

How High Can You Count? 602,200,000,000,000,000,000,000

What is Avogadro’s Number ?

I. Avogadro’s Number Italian chemist who studied gases From his experiments, he developed the idea of the mole

II. The Mole The mole is simply a number. This is just like the concept of a dozen You can have dozen dogs or dozen chairs, each describes that we have 12 off them. A mole is simply 6.022 x 1023 of something. This means we could have a mole of atoms or a mole of M & Ms. Each means that we have 6.022 x 1023 of them

What does 1 mole look like?