Vocabulary
Moles to Moles
Mixed Problems
Mass to Mass
Miscellaneous
100
A conversion factor that relates the amounts in moles of any two substances involved in a chemical reaction.
What is mole ratio?
100

CO2 + 2LiOH --> Li2CO3 + H2O How many moles of Li2CO3 are required to react with 20 mol of CO2?

What is 20 mol LiOH?

100

Mg + 2HCl --> MgCl2 + H2

How many grams of hydrogen will be produced if we start with 2 moles of hydrochloric acid and excess magnesium?

What is 2 g H2?

100

Mg + 2HCl --> MgCl2 + H2 What mass of hydrogen is produced from the reaction of 75 g HCl (MM=36.5 g/mol) and excess Mg?

What is 2.0 g H2?

100

N2 + 3H2 --> 2NH3 In the reaction above, a student reacted 28 g of nitrogen with an excess of hydrogen. According to the students measurements, the reaction produced 30 g of product. The theoretical yield was 34 g. What is the student's percent error?

What is 11.7%?

200

The measured amount of product obtained after performing a chemical reaction.

What is actual/experimental yield?

200
6CO2 +6H2O --> C6H12O6 + 6O2 How many moles of carbon dioxide are needed to react with 3.25 mol of water in the reaction described above?
What is 3.25 mol CO2?
200
Mg + 2HCl --> MgCl2 + H2 What mass of hydrochloric acid (MM=36.5 g/mol) is needed to react with 2.50 moles of magnesium?
What is 182 g HCl?
200
2KClO3 --> 2KCl + 3O2 How many grams of KCl are produced if 5.0 g of KClO3 is decomposed?
What is 3 g KCl?
200

How many atoms are in a mole?

What is 6.022 x 10^23?

300
The reactant that determines the amounts of the other reactants that can combine--and the amount of product that can form--in a chemical reaction.
What is the limiting reactant?
300
2Mg +O2 --> 2MgO How many moles of magnesium oxide are produced from 1.2 moles of magnesium?
What is 1.2 mol MgO?
300

4 Al + 3 O2 --> 2 Al2O3

How many moles of aluminum atoms are needed to combine with 1.58 mol of oxygen molecules to make aluminum oxide?

What is 2.1 mol Al?

300

CH4+4Cl2→CCl2+4HCl

How many grams of HCl are produced by the reaction of 100.0 g of CH4? 

911 grams HCl

300

4 Al2O3 + 9 Fe -->3 Fe3O4 + 8 Al

Aluminum oxide reacts with iron to form Fe3O4 and Aluminum. Determine with limiting reactant when 5 moles of aluminum oxide reacts with 7 moles of iron.

What is iron?

400

The difference between your experimental yield and theoretical yield, calculated using a formula.

What is percent error?

400

3 H2 +  N2 --> 2 NH3

Ammonia, NH3, is widely used as a fertilizer and in many household cleaners. How many moles of ammonia are produced when 6 mol of hydrogen gas react with an excess of nitrogen gas?

What is 4 mol NH3?

400

2 NH3 --> N2 + 3 H2

Ammonia decomposes to produce nitrogen and hydrogen gases. How many grams of H2 can be formed by the decomposition of the mass of 25 grams of NH3?

What is 4.45 grams of H2?

400

2 Ga2O3 → 4 Ga + 3 O

How many grams of Gallium would be produced from 250 grams of gallium oxide?

What is 186 grams of Gallium

400

Write the complete balanced equation for the following reaction:

___ LiOH + __H2SO4  -->___ Li2SO4  + ___H2O

What is: 2LiOH (s) + H2SO4 (aq) --> Li2SO4 (aq) + 2H2O (l)

500
States that mass is neither created nor destroyed during ordinary chemical or physical reactions. (This is why we balance chemical equations!)
What is the law of conservation of mass?
500

__H2 + __O2 --> __H2O

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?

Balance and then find your answer.

What is 2.5 mol O2?

500

How many moles are present in 34 grams of Cu(OH)2?

What is 0.35 mol Cu(OH)2?

500

4 NH3 + 5 O2 --> 4 NO + 6 H2O

How many grams of O2 are needed to fully react with 2.5 grams of NH3?

What is 5.9 grams of O2?

500

__ H2 + __O2 --> __ H2O

Balance the equation and find out how many grams of H2O could be produced from 50 grams of O2 

What is 14.08 grams of H2O?