# Chemistry ch 8

 Mole SI unit for the amount of substance in a given example. Moles are equal to the amount of substance that contains as many particles as 12g C-12 Avagadro's Number The number of particals (atoms) in a mole of any element Molar mass is measured in g/mol Molecular mass is measured in u Molar mass The mass of one mole of a pure substance(Atomic weight) Most reactions take place in a solution Molarity Describes the concentration of a solution Molarity formula Moles of solute//dm^3 of solvent Or Moles//Liters Percent compisition of a compound gives the Relative amount of each element present Percent compisition stepls 1. Calculate the molar mass of each element2. Calculate the formula mass for the compound3. Divide the mass of each element by the total4. Multiply by 100 Empirical Formula The simplest whole-number ratio of different atoms in a compound Moles in a compound are in simple, whole number ratios Hydrates Crystalline compounds (solids) in which ions or molecules of the compounds attach to one or more water molecules. AuthorAnnaIsCool ID54021 Card SetChemistry ch 8 Descriptionchapter 8 the mole Updated2010-12-07T16:48:01Z Show Answers