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Vocabulary
Moles to Moles
Mixed Problems
Mass to Mass
Mole/Mass
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 lithium hydroxide are required to react with 20 mol of CO2?
What is 40 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?

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 yield?
What is 88%?
200

This is the ratio for molar mass. 

What is grams per mole? 

G/Mol

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

Using the balanced equation 2Cu + O2 --> 2CuO, if 101g of Cu are used, how many moles of CuO will be formed?

1.58 mol CuO

300

This is Avogadro's Number.

What is 6.02 x 1023?

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
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. Determine the amount of product that can be produced from 24.7 g of sodium and excess chlorine.

What is 62 g NaCl?

300

Using the balanced equation 2Cu + O2 --> 2CuO, if 78.2 grams of oxygen react with copper, how many moles of copper (II) oxide will be produced?

4.89 mol CuO

400

This is a SI unit of measurement. It can include Avogadro's number or molar mass. 

What is the mole?

400
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

DAILY DOUBLE! 

Ammonia decomposes to produce nitrogen and hydrogen gases. How many moles of H2 can be formed by the decomposition of 0.145 moles of ammonia?

What is 0.218 mol H2?

400

Sodium hydroxide reacts with sulfuric acid to form water and sodium sulfate. How many grams of sodium sulfate will be formed from 200 g NaOH and an excess of sulfuric acid?

What is 355 g Na2SO4?

400

Using the balanced equation: 

2C4H10 + 13O2 --> 8CO2 + 10H2O, how many grams of CO2 will be produced if 3.5 moles of O2 react?

94.8g CO2

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
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?
500

Aluminum oxide reacts with iron to form Fe3O4 and Aluminum. If 45.0 g of aluminum oxide are used in the reaction, how many grams of Fe3O4 will be produced? 

76.76g Fe3O4

500

When nitrogen and hydrogen react, they form ammonia gas (NH3). If 56.0g of nitrogen are used up in the reaction, how many grams of ammonia will be produced?

What is 68g NH3?

500

DAILY DOUBLE!

1. Balance the following equation:

NH3 + O2 --> N2 + H2O

2. How many grams of water will be produced if 0.55 moles of oxygen react? 

1. 4, 3, 2, 6

2. 19.8g H2O