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Chemistry Exam

QuestionAnswer
"What is stoichiometry Using balanced chemical equations to calculate amounts of reactants and products
"What is the first step in any stoichiometry problem Write and balance the chemical equation
"What is the mole ratio The ratio of coefficients from a balanced equation used to convert between substances
"What is the conversion factor between moles and particles One mole equals 6.022 times ten to the twenty third particles
"What is the conversion factor between moles and molar mass Moles equal mass divided by molar mass
"What is the conversion factor between moles and volume of a gas at STP One mole equals twenty two point four liters
"What is theoretical yield The maximum amount of product predicted by stoichiometry
"What is actual yield The amount of product actually produced in a lab
"What is percent yield Actual yield divided by theoretical yield times one hundred
"What is enthalpy The heat content of a system at constant pressure
"What is the symbol for enthalpy change Delta H
"What does a negative delta H mean The reaction is exothermic and releases heat
"What does a positive delta H mean The reaction is endothermic and absorbs heat
"What is the formula for heat change using mass Q equals m c delta T
"What does c represent in Q equals m c delta T Specific heat capacity
"What is Hesss Law The total enthalpy change equals the sum of the steps of the reaction
"What is the enthalpy of formation The heat change when one mole of a compound forms from its elements
"What is a mole A counting unit equal to 6.022 times ten to the twenty third particles
"What is molar mass The mass of one mole of a substance
"What is the formula to convert grams to moles Moles equal grams divided by molar mass
"What is the formula to convert moles to grams Grams equal moles times molar mass
"What is the formula to convert moles to particles Particles equal moles times Avogadros number
"What is the formula to convert particles to moles Moles equal particles divided by Avogadros number
"What is molarity Moles of solute divided by liters of solution
"What is the formula for molarity M equals n divided by V
"What is dilution Lowering concentration by adding solvent
"What is the dilution formula M1 V1 equals M2 V2
"What is a solute The substance being dissolved
"What is a solvent The substance doing the dissolving
"What increases concentration More solute or less solvent
"What decreases concentration Less solute or more solvent
Created by: user-2005084
 

 



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