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

What is 40 mol LiOH?

100

Mg + 2 HCl --> 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 + 2 HCl --> MgCl2 + H2 What mass of hydrogen is produced from the reaction of 75 g HCl  and excess Mg?

What is 2.1 g H2?

100

Avogadro's number

What is 6.02 x 1023?

200
The measured amount of product obtained after performing a chemical reaction.
What is actual yield?
200

6 CO2 +6 H2O --> C6H12O6 + 6 O2 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 + 2 HCl --> MgCl2 + H2 What mass of hydrochloric acid is needed to react with 2.50 moles of magnesium?

What is 182 g HCl?

200

2 KClO3 --> 2 KCl + 3 O2 How many grams of KCl are produced if 5.0 g of KClO3 is decomposed?

What is 3.0 g KCl?

200

What is the percent yield for a reaction where the theoretical yield is 34 g, and the actual yield is 29 g?

What is 85%?

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

2 Mg +O2 --> 2 MgO How many moles of magnesium oxide are produced from 1.2 moles of magnesium?

What is 1.2 mol MgO?

300

Al + O2 ---> 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

Sodium and chlorine react to produce sodium chloride. 

 Na + Cl2 ---> NaCl

Determine the amount of sodium chloride that can be produced from 71.0 g of chlorine and excess sodium.

What is 117 g NaCl?

300

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

What is 0.35 mol Cu(OH)2?

400
The ratio of the actual yield to the theoretical yield, multiplied by 100.
What is percent yield?
400

Ammonia is synthesized from nitrogen and hydrogen.

N2 + 3 H2 ---> 2 NH3

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

Ammonia decomposes to produce nitrogen and hydrogen gases.  NH3 --> N2 + H2

How many moles of H2 can be formed by the decomposition of 0.145 moles of ammonia?

What is 0.218 mol H2?

400

NaOH + H2SO4 ---> Na2SO4 + H2O

How many grams of Na2SO4 will be formed from 200.0 g NaOH and an excess of H2SO4?

What is 355 g Na2SO4?

400

2 LiOH + H2SO4  --> Li2SO4 + 2 H2O

The limiting reactant when 5.0 g of LiOH reacts with 9.0 g of H2SO4.

What is H2SO4 ?

500

States that mass is neither created nor destroyed during ordinary chemical or physical reactions. (This the reason we balance chemical equations!)

What is the law of conservation of mass?

500

Hydrogen and oxygen gases to produce water. How many moles of oxygen would be required to produce 5.0 moles of water?

What is 2.5 mol O2?

500

4 Al2O3 + 9 Fe ---> 8 Al + 3 Fe3O4

The limiting reactant when 5.0 mol of aluminum oxide reacts with 10.0 mol of iron metal

What is iron?

500

Aluminum oxide reacts with iron metal to form Fe3O4 and aluminum metal. 

How many grams of Fe3O4 are formed when 157 grams of aluminum oxide reacts with excess iron metal?

What is 267 g Fe3O4?

500

C3H8 + 5 O2 ---> 3 CO2 + 4 H2O

The number of moles of excess reactant left over after 6.0 moles of propane (C3H8) reacts with 25.0 mol O2.

What is 1.0 mol C3H8?

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