Unit 3 Review

Molar Mass

100

Find the molar mass of the following compounds. Round all answers to the nearest hundredth.

F

19 grams/mole

200

Find the molar mass of the following compounds. Round all answers to the nearest hundredth.

H₂O

18.02 g/mol H₂O  

300

Find the molar mass of the following compounds. Round all answers to the nearest hundredth.

Br₂

159.81 g/mol

400

Find the molar mass of the following compounds. Round all answers to the nearest hundredth.

(NH₄)₂SO₄

132.14 g/mol

500

Find the molar mass of the following compounds. Round all answers to the nearest hundredth.

Ga₂(SO₃)₃

379.64 g/mol

Balancing Act

100

Balance the following equation 

___O2 +  ___H2 →___H2O      

    1O₂ +  1H₂→ 2H₂O                              

200

Balance the following equation:

___H2O + ___AgI →  ___HI + ___ AgOH    

1 H₂O + 1AgI →1HI + 1AgOH    

300

Balance the following equation:

___NaBr + ___Ca(OH)₂ →___CaBr₂ + ___NaOH        

2NaBr + 1Ca(OH)₂ →  1CaBr₂ + 2NaOH    

400

Balance the following equation

___AgNO₂ + ___BaSO₄ →___Ag₂SO₄ + ___Ba(NO₂)₂  

2AgNO₂ + 1BaSO₄→1Ag₂SO₄ + 1Ba(NO₂)₂    

500

Balance the following equation:

___LiBr + ___ Co(SO₃)₂   → ___Li₂SO₃ + ___CoBr₄      

4LiBr + 1Co(SO₃)₂ →2Li₂SO₃ + 1CoBr₄          

It Matters

100

Is Mercury an element, compound, or mixture?

Element

200

Is table salt, sodium chloride, an element, a compound or a mixture? 

Compound

300

What type of a mixture is Coffee?

homogeneous mixture

400

Water can boil at 100 degrees celsius.  What type of change is this?

Physical change

500

Vinegar reacts with baking soda to create a brand new gas (Carbon Dioxide). Is this a physical or chemical change? 

Chemical change

Stoichiometry

100

Given the following balanced equation:

2NaI + 1CaCl₂→2NaCl + 1CaI₂      

How many moles of Calcium chloride will react with 2 moles of Sodium iodide?

1 mole of CaCl₂

200

Given the following balanced equation:

2NaI + 1CaCl₂→2NaCl + 1CaI₂      

How many moles of Sodium chloride will be produced from 2 moles of Sodium iodide (NaI)?

2 moles of NaCl

300

Given the following balanced equation:

2NaI + 1CaCl₂→2NaCl + 1CaI₂     

Calculate the moles of Calcium iodide that would form if 2 moles of Calcium chloride reacted

2 moles of Calcium Iodide

400

Give the balanced equation:

C₃H₈+5O₂ → 3CO₂+4H₂O

How much CO2 is created if 28.3 moles of oxygen are consumed?

16.98 mol CO2

500

Give the balanced equation:

C₃H₈+5O₂ → 3CO₂+4H₂O

An afternoon barbecue uses 40 moles of propane. How many moles of CO₂ are created?

120 mol CO₂

Types of Chemical Reactions

100

What is the type of chemical reaction for the following?

2HCN + CuSO₄ →H2SO₄ + Cu(CN)₂    

Double Replacement

200

What type of chemical reaction is this?

H₂CO₃ →CO₂ + H₂O      

Decomposition 

300

What type of chemical reaction is the following equation displaying? 

N₂ + 2O₂ →2NO₂   

Synthesis 

400

What type of chemical reaction is this?

2Ag + CuSO₄ → Ag₂SO₄ + Cu  

Single Replacement

500

What type of chemical reaction is this?

4C₅H₉O + 27O₂ →  20CO₂ + 18H₂O  

Combustion