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Calculating Isotope Abundance in Chemistry

okay so basically the number i’m talking about is called avogadro’s number, which is the number of particles in one mole (6.02214076 × 10^23). scientists obviously didn’t literally sit there and count atoms one by one. instead they figured it out indirectly using experiments with gases, mass, and atomic weights. over time they realized that if you take the atomic mass of something in grams, that amount contains the same giant number of atoms. for example: 1 mole of carbon weighs about 12 grams a