NOTE – YOU WILL NEED A SCIENTIFIC CALCULATOR FOR …

Counting Particles. Chemists need a convenient method for accurately counting the number of atoms, molecules, or formula units of a substance. The _____is the SI base unit used to measure the amount of a substance. Moles (is abbreviated: mol) It is an _____, defined as the number of carbon atoms in exactly 12 grams of carbon-12. ................
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