Definitely Stoichiometry
What is the name given to the proportional relationship between two coefficients in a balanced chemical equation?
mole ratio
For the reaction __O2 + __H2 -->__ H2O, what is the mole ration for O2/H2?
1 mole O2 / 2 moles H2
For the reaction O2 + 2 H2 --> 2 H2O, 32.00 g O2 can produce 2 moles H2O and 2.02 g H2 can produce 1 mole H2O, which reactant is the limiting reactant?
hydrogen (H2)
Mass is measured in what units?
grams
When solving a T-chart, what do we always do to the numbers across the bottom of the T?
divide
Equations must be balanced to obey this law
The conservation of mass
For the reaction __N2 + __ H2 --> __ NH3, what is the mole ratio for NH3/H2?
2 moles NH3 / 3 moles H2
For the reaction O2 + 2 H2 --> 2 H2O, 128.00 g O2 can produce 8 moles H2O and 8.08 g H2 can produce 4 moles H2O, which reactant is the excess reactant?
oxygen (O2)
What counting unit is used to measure the number of particles in a substance?
moles
Where do the units of the desired answer always appear in a T-chart?
upper right of T
What is the name given to the substance that controls the quantity of product that can form in a chemical reaction?
limiting reactant
For the reaction __ PCl3 + __ H2O --> __ H3PO3 + __ HCl, what is the mole ratio for H2O/HCl?
3 moles H2O / 3 moles HCl
For the reaction N2 + 3 H2 --> 2 NH3, 28.02 g N2 can produce 2 moles NH3 and 12.12 g H2 can produce 4 moles NH3, which reactant is the excess reactant?
hydrogen
A molar mass always has the ratio of what units?
grams / mole
When solving a T-chart, what do we always do to the numbers across the top of the T, multiply or divide?
multiply
What is the name given to the substance that is not used up completely in a chemical reaction?
excess reactant
For the reaction of iron (III) oxide with aluminum to form aluminum oxide and iron, what is the molar ratio between iron oxide and aluminum oxide?
1 mole Fe2O3 / 1 mole Al2O3
For the reaction N2 + 3 H2 --> 2 NH3, 2.5 mol N2 and 5 mol H2, which reactant is the limiting reactant? (convert to mol of product)
5 mol H2 -> 3.33 mol NH3
H2 is LR
A mole ratio always has the ratio of what units?
moles / moles
If a T-chart has been set up properly, what should we always be able to do to the units on the diagonal from upper left to lower right?
cancel the units
What is the name given to maximum amount of product that can be made from the limiting reactant?
theoretical yield
Hydrogen and oxygen gases react under a specific set of conditions to produce water. How many moles of oxygen would be required to produce 5.0 moles of water?
What is 2.5 mol O2?
For the reaction __ PCl3 + __ H2O --> __ H3PO3 + __ HCl, what is the theoretical yield of HCl when 6 mol of water and 5 mol of PCl3 react?
?
Which is the unit of something that can be directly measured, grams or moles?
grams
In __N2 + __H2 -> __NH3 how many grams of Ammonia are produced from 10.0 grams of nitrogen and excess ammonia?
(hint convert to grams)
??