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The Mole

Regents Chem- the mole

A mole the amount of particles that have their mass in grams equal to their atomic masses. 6.02x10 23 particles
Formula mass sum of all the masses in a formula, in amu’s
Gram formula mass sum of all the masses in a formula, in grams
Molar mass synonym of gram formula mass
Percent composition (mass of the part/mass of the whole cmpd) x 100
Percent yield (mass you actually produced / theoretical maximum amount that could have been produced) x 100
Calculation average isotopic mass multiply each isotopes mass by its abundance in decimal form. Add these to get the final average. DO NOT divide by ANYTHING at the end!
Molecule a group of elements with covalent bonds
Formula units ions, held together by ionic bonds
Atoms elements, not bonded to anything else
Empirical formula contains subscripts in the lowest possible ratio
Molecular formula contains subscripts not reduced to lowest ratio
mole ratio the coefficient ratio from a balanced equation
stoichiometry using mole ratio and mole conversion to predict experimental yields
Created by: etucci