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The mole is the chemist's dozen. We will use it to "count" atoms, molecules, photons, etc. Often this is done by weighing a sample since the particles are so small to physically count them. For now, we will focus on applying Avogadro's number ( N_A ) to covert between objects (atoms, molecules, photons, etc.) and moles.

Hopefully, that looks like something you have seen before. It's the same concept as a dozen.

Give this calculation a try:

Now, using the same approach, can you calculate the following?