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WCHS Chemisty Mole, Molar Mass, equations

Mole The SI base unit used to measure the amount of a substance whose number of particles is the same as the number of atoms of carbon in exactly 12 grams of carbon-12.
Avogadro’s number 6.022x1023 the number of atoms or molecules in 1.000 mol
Molar mass the mass in grams of one mole of a substance
Average atomic mass the weighted average of the masses of all naturally occurring isotopes of an element.
Percent composition the percentage by mass of each element in a compound
Empirical formula a chemical formula that shows the composition of a compound in terms of the relative numbers and kinds of atoms in the simplest ratio
Molecular formula a chemical formula that shows the number and kinds fo atoms in a molecule, but not the arrangement of the atoms.
Chemical reaction the process by which one or more substances change to produce one or more different substances
Chemical equation a representation of a chemical reaction that uses symbols to show the relationship between the reactants and the products
Created by: dmoudy