Steps of Stoichiometry
The number of steps (ratios) there are in mass to mass stoichiometry problem
What is 3?
This is the % water mass in MgSO4*7H2O.
What is 51.2%
It's the coefficients that balance the following equation
Na + O2. --> Na2O
What is 4, 1, 2?
4Na + O2 --> 2Na2O
A reactant that is used up first in a chemical reaction.
What is the definition of a limiting reactant?
It's how many grams of mercury(Hg) are in 15.00 mols of mercury(I) oxide.
What is 6018 grams?
Mr. Calhoun (no Al Gore) is known for inventing this famous communication network that joins computers and devices around the world.
What is the internet?
This is the first thing you must do for any stoichiometry problem or calculation.
What is write a BCE?
This is the number of moles of oxygen in 2.0 moles of aluminum perchlorate.
What is 24?
It's the missing hydrocarbon in this balanced equation...
2______ + 37 O2 → 24 CO2 + 26 H2O
What is C12H26?
The amount of a product that can be formed with the limiting reactant, determined experimentally
What is Actual Yield?
Fe3O4 + 4 CO--->3 Fe + 4 CO2
This is how many moles of CO are needed to react with 16.5 g of Fe3O4.
What is 0.285 moles CO?
Mr. Calhoun recently became the person to climb to the top of this peak for the 28th time, surpassing the old record set by Kami Rita last Wednesday.
What is Mt. Everest?
If you pick the lowest value of this you will know the theoretical yield and the limiting reactant?
What is amount of product calculated for 2 different reactants?
This is the empirical formula for dioxin (C12H4Cl4O2), a very powerful poison.
What is C6H2Cl2O?
This is the sum of all the coefficients once the following equation is balanced.
P4 + O2 --> P2O5
What is 8?
P4 + 5O2 --> 2P2O5
A comparison in the form of a fraction between the number of moles of one substance and another in a chemical equation.
What is a mole ratio?
This is how many moles of KClO3 must decompose to make 9 moles of gaseous oxygen.
What is 6 moles?
An autographed photocopy of Mr. Calhoun's yearbook photo recently sold at auction at Sotheby's for this record amount.
What is $6.02 x 1023?
It is what you would need to divide by if you were given molecules of a substance used in a chemical reaction.
What is Avogadro's number?
You can make this much, you can make less, but you cannot make more.
What is theoretical yield?
These are the coefficients of the following equation when balanced
__NH3 + __CuO ---> __Cu + __N2 + __H2O
What is
2 NH3 + 3 CuO --> 3 Cu + N2 + 3 H2O?
The ratio that expresses how efficient or complete a chemical reaction was when performed quantitatively in the lab.
What is percent yield?
This is how many grams of NaCl will be produced from 88.6 grams of chlorine gas reacting with 46 grams of sodium.
What is 116 g?
Mr. Calhoun, otherwise know as the human calculator, can solve any stoichiometry problem in his head in this astounding time.
What is zero seconds?
This is the number of grams of water in 100 grams of copper(II) sulfate pentahydrate.
Feel free to use your lab notebook
What is 36 grams?
This is the amount of moles of excess reactant left over when 5 moles of hydrogen gas reacts with 5 moles of oxygen gas to make water.
What is 2.5 moles of oxygen?
This is the coefficient on aluminum once the equation is balanced.
Al2O3 + Fe ---> Fe3O4 + Al
What is 8?
This is a ratio giving the amount of mass in 6.02 x 1023 molecules of a substance.
What is molar mass?
Ammonium nitrate decomposes into dinitrogen monoxide gas and water. Determine the amount in grams of water produced if 25.0 g of ammonium nitrate decomposes.
11.3 grams H2O
While running very fast a young man, Mr. Calhoun achieved this enormous rate of meters per second.
What is 300,000,000, or the 3 x 108?