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Chemistry Chapter 3

General Chemistry

quantitative amount
molecular mass sum of the masses of the atoms represented in a molecular formula (mass of a molecule in u)
formula mass for ionic compounds where the sum of the masses of the atoms or ions present in a formula unit
mole (mol) amount of substance that contains as many elementary entities as there are # of atoms in exactly 12g of the carbon-12 isotope
avogadro's number 6.022 x 10^23
molar mass is the mass of one mole of a substance. Molar mass is numerically equal to atomic mass, molecular m ass, or formula mass however, the untis of molar mass are grams (g/mol)
mass percent composition a compound refers to the proportion of the constituent elements, expressed as the number of grams of each element per 100 grams of the compound.
whole-number ratio find the whole number ratio by dividing each number of moles by the smallest number of moles
molecular formula is a simple integer multiple of the empirical formula. Molecular formula mass/empirical formula mass= integer (nearly)
Created by: khczopek



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