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Types of Reactions
Balancing
Molar Mass
Stoichiometry 1
Stoichiometry 2
100

A reaction in which a compound breaks down into two or more simpler substances.

Decomposition Reaction

100

K2SO4 (aq)   +   Ba(NO3)2 (aq)   ->  BaSO4 (s)  + KNO3 (aq) 

The coefficients needed to balance the chemical equation above are ____.

1, 1, 1, 2

100

What is the molar mass of Fe?

55.845 g/mol

100

How many atoms are in 12 g of water?

4.013 x 1022 atoms

100

How many moles of carbon dioxide are also produced by the reaction above? 9.76 mol SO2

CS2 +     O2    ->    CO2   +     SO2

4.88 moles

200

K2SO4 (aq)   +   Ba(NO3)2 (aq)   ->  BaSO4 (s)  + KNO3 (aq)

The reaction above is an example of a _______ reaction.

Double Replacement

200

Balance this equation:

CS2 +     O2  ->    CO2   +     SO2

1, 3, 1, 2

200

What is the molar mass of CO2?

44 g/mol

200

What is the mass of 1.12 x 1024 molecules of SO3?

149 g

200

CO2   + 2 KOH    ->   K2CO3   +  H2O 

How many moles of CO2 are needed to exactly react with 1.24 moles of KOH? 

0.62 moles CO2

300

Classify this reaction: ___ Mg + ____ N2 → ____ Mg3N2

Synthesis

300

Balance this equation: 

__ Sb + ___ Cl2 → ___ SbCl3

2, 3, 2

300

What is the Molar Mass of NH4+?

28.04 g/mol

300

How many grams are in 5.02 x 1024 atoms of C6H12O6?

1,501 g

300

How many moles of carbon disulfide are needed to produce 9.76 moles of sulfur dioxide?

CS2   +     O2    ->    CO2   +     SO2

4.88 moles

400

A reaction in which a substance reacts rapidly with oxygen, often producing heat and light. Oxygen is always a reactant, water and carbon dioxide is always the product.

Combustion Reaction

400

___ Mg + ____O2 → ___MgO

2 , 1, 2

400

Calculate the molar mass of magnesium acetate, Mg(C2H3O2)2.

142.41 g/mol

400

H2SO4 + 2NaOH ---> H2O + Na2SO4 How many molecules of water are produced if 2g of sodium sulfate are produced in the above reaction?

8.5 x 1021 molecules 

400

How many moles of oxygen are needed to completely react with the carbon disulfide in the reaction above? 9.76 moles SO2

CS2 +     O2  ->    CO2   +     SO2

14.64 moles

500

C8H18 + O2 ----> CO2 + H2O is what type of reaction?

Combustion

500

Balance: C8H18 + O2 ----> CO2 + H2O

(Hint: Need whole numbers)

2, 25 , 16, 18

500

What is the molar mass of Al2(SO4)3?

342.15 g/mol

500

Phosphoric acid, H3PO4, reacts with sodium hydroxide to produce sodium phosphate and water.

H3PO4  +   NaOH   ->  Na3PO4  +  H2O

How many grams of sodium phosphate are produced from 45.7 grams of H3PO4?

76.2 g Na3PO4

500

What mass of iron III oxide is produced when 2.02 grams of elemental iron react with excess oxygen gas, according to the unbalanced equation:

    Fe (s)   +        O2 (g)      →       Fe2O3 (s)

2.89 g