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Chapter 9 BJU

chemistry terms

TermDefinition
mole The amount of substance contained in 6.022 x 10 23rd particles
Avogadro's number 6.022 x 10 23rd
molar mass mass of one mole of any pure substance
structural formula type of atoms involved, the exact composition of each molecule and the arrangement of chemical bonds
molecular formula types and numbers of atoms involved as they appear in the molecule
empirical formula tells what elements are present and give the simplest whole -number ration of atoms in the compound
percent composition describes the mass composition of a compound by showing what percentage of its total mass comes from each element.
law of definite composition the ratio of elements in a comound is constant for every particle in that compound
stoichiometry mathmatical relationships between the amounts of reactants and the products in a chemical reaction
mole ratio the coefficients from the balanced equation give the ratios between the moles of one substance and the moles of another substance
limiting reactant when one reactant is used up before the others which prevents more products from forming
excess reactant leftover substances one or more in its unchanged original states
theoretical yield maximum amount of product that could be created from a given amount of reactant
actual yield the measured amount of product at the end of a reaction usually expressed in grams of the product
percent yield percentage of the theoretical yield that was actually produced calculations done by taking ration of the actual yield divided by theoretical yield x 100%
Created by: RiddleBCA