Learn the basics about using moles. This is part 1 of 3 parts, teaching you about using moles, as a part of the chemical calculations topic.
Avogadro’s number describes what is known as 1 mole, or 12 g of carbon atoms. This is used in chemical calculations.
For any element, the relative atomic mass is the weight in grams for one mole.
When we compare chemicals, we compare equal numbers of particles, even though the weights are different. So if we have compounds instead of atoms, it doesn’t matter how many atoms are in the formula, only the number of compound particles.
For any compound, the relative molecular mass (or Mr) is the weight in grams for one mole, or Avogadro's Number.
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