When the atomic or formula mass from the periodic table is expressed in grams, the number of atoms or molecules in that mass is equal to one mole. Duration: 12:15.
VIDEO CHECK QUESTIONS
9.6a How many atoms of an element do you have when you express its atomic mass in units of grams?
9.6b How many water molecules are there in 18 grams of water?
9.6c Which has more molecules: 4 grams of diatomic hydrogen or 32 grams of diatomic oxygen?
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