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Mighty Moles
Vocab
Magical Mole-Mole
Mysterious Mass-Mass
Name Your Limit (ing Reactant)
100
6.02 x 10^23 particles
What is one mole?
100
A reactant that has left-overs after the reaction has stopped.
What is an excess reactant?
100
The molar mass of calcium hydroxide.
What is 74 g/mol?
100
The units of molar mass.
What is g/mol?
100
The reactant which runs out first.
What is the limiting reactant?
200
Another name for the mole, 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
You should look here when solving a mass-mass problem.
What is the periodic table?
200
3H2 + N2 = 2NH3 given 5 grams of H2 and 20 grams of N2 This is the limiting reactant.
What is N2?
300
The unit factor for a problem involving molar mass.
What is 1 mole over x grams or x grams over 1 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
Represented by the coefficient in a balanced chemical equation.
What is the 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
Convert both masses of reactants to moles, then compare mole ratios.
What are the steps to naming the limiting reactant?
500
The number of names that the inventor of the mole has, we affectionately call him Avogadro.
What is five?
500
The calculation of quantitative (measurable #) relationships of the reactants and products in a balanced chemical reaction.
What is stoichiometry?
500
To get these, look at the coefficients in the balanced equation.
What is the numbers for a mole/mole ratio.
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 + 2H2 → Sn + 2H2O You have 36 g of SnO2 and 36 g of H2. Find the limiting reactant.
What is SnO2?