Mighty Moles
Vocab
Magical Mole-Mole
Mysterious Mass-Mass
Name Your Limit (ing Reactant)
100
What is one mole?
6.02 x 10^23 particles
100
The calculated yield of a reaction.
Theoretical Yield (% yield is your actual, experimental value, not your calculated value).
100
The molar mass of calcium hydroxide.
What is 74 g/mol?
100
SI unit of mass.
the gram
100
The reactant which runs out first.
What is the limiting reactant?
200
Another name for the mole (named after the scientist who studied it)
What is Avogadro's number?
200
Equations must be balanced so that they will obey this law.
What is the Law of Conservation of Mass/Matter?
200
C5H12 + 8O2 = 5CO2 + 6H2O The number of moles of carbon dioxide can I make if I start with 16 moles of oxygen gas.
What is 10 moles?
200
When solving a mass-mass problem, what do you use to convert from grams to moles?
molar mass
200
actual yield/theoretical yield x 100 =
What is percent yield?
300
The units of molar mass.
grams per mole
300
On the left side of the equation in front of the yields sign.
What are reactants?
300
Balance. ___Al + ___Fe3O4 ---> ___Al2O3 + ___Fe
What is 8 Al + 3 Fe3O4 ---> 4 Al2O3 + 9 Fe ?
300
The number of grams of magnesium in 7.00 moles.
What is 168 g?
300
The reagents which do not run out when the reaction stops.
What are the reactants/reagents in excess?
400
What does a coefficient in a balanced chemical equation represent?
number of moles
400
The thing that will cause your reaction to stop.
What is the limiting reactant/reagent? (when it runs out)
400
___CH4 + ___O2 --> ___ CO2 + ___H2O If I want to get 5.3 moles of water, how many moles of methane do I need?
What is 2.65 moles of methane?
400
____Al2O3 --> ____Al + ____ O2 The number of grams of Al2O3 which decompose if 81 grams of Al react with oxygen gas.
What is 153 grams Al2O3?
400
What are the first steps to determining the limiting reactant?
Balancing the equation, then converting both masses of grams to moles.
500
The number of liters of one mole of a gas @ STP.
What is 22.4 L?
500
The calculation of quantitative (measurable #) relationships of the reactants and products in a balanced chemical reaction.
What is stoichiometry?
500
How do you get a mole to mole ratio?
use the coefficients from the balanced chemical equation
500
___H2 + ___ O2 --> ___ H2O The number of grams of oxygen gas which are needed to produce 10 grams of water.
What is 8.89 grams of O2?
500
___SnO2 + ___H2 → ___ Sn + ___H2O You have 36 g of SnO2 and 36 g of H2. Find the limiting reactant.
What is SnO2?
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