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Chemical Reactions
Counting Atoms
Type of Reactions
Balancing Act
Padilla
100
One of the following is NOT a physical change: splitting wood, melting ice, burning wood or dissolving salt in water.
What is burning wood?
100

In the formula 2H2O, this is the number of oxygen atoms.

What is 2?

100

The reaction 2HgO --> 2Hg + O is an example of this type of reaction.

What is Decomposition?

100

When the number of atoms are equal on both sides of the equation, this law has been fulfilled.

What is the Law of Conservation of Mass

100

A substance that enters a chemical reaction is called this.

What is a reactant?

200
In a chemical reaction the substances to the right of the arrow are called this/these?
What is/are products?
200

DOUBLE JEOPARDY!!!!!!!!!!

How many O atoms on the product side in the equation shown - C3H8 + 5O2 --> 3CO2 + 4H2O

200
When two or more simple substances combine to form a new, more complex substance it is this type of reaction.
What is synthesis?
200

DOUBLE JEOPARDY!!!!!!!!!!!!!

These are used to help balance chemical equations. 

200

Balance the reaction: Na + H2O -> NaOH + H2

What is 2Na + 2H2O -> 2NaOH + H2

300
The number that describes how many molecules of a substance are involved in a chemical reaction.
What is a coefficient?
300

In the formula 3Fe2(SO4)3, this is the number of oxygen atoms.

What is 36?

300

DOUBLE JEOPARDY!!!!!!!!!

Name the type of reaction - C3H8 + 5O2 -> 3CO2 + 4H20

300

Balance the following chemical equation. You must show all work and simplify your answer. Fe + O2 --> Fe2O3


4Fe + 3O2 --> 2Fe2O3 

300
State the Law of Conservation of Mass.
What is that matter can not be created or destroyed in a chemical reaction?
400
When balancing an equation, this can not be changed.
What is a subscript?
400

DOUBLE JEOPARDY!!!!!!!!!!!!!

In the formula 5CaSO4, this is the number of oxygen atoms.

400

What reaction is this shown below?

KBr + AgNO3 --> KNO3 + AgBr

What is Double Replacement?

400

Balance the following equation. You must show all work and simplify your answer! Li + Br2 --> LiBr


2Li + Br2 --> 2LiBr

400

Balance the reaction: C3H8 +O2 -> CO2 + H20

What is C3H8 + 5O2 -> 3CO2 + 4H20

500
Give three examples that a chemical change has taken place.
What is temp. change, color change, formation of an alloy, formation of a precipitate, formation of a gas?
500

DOUBLE JEOPARDY!!!!!!!

How many O atoms on the product side in the equation shown - 2C6H6 + 15O2 --> 12CO2 + 6H2O

500

What reaction is this shown below?

Cl2 + 2NaBr --> 2NaCl + Br2

What is Single Replacement?

500

Balance the following equation. You must show all work and simplify your answer! C6H6 + O2 --> CO2 + H2O

What is 2C6H6 + 15O2 --> 12CO2 + 6H2O


500

Balance the reaction: HCl + Ca(OH)2 -> CaCl2 + H2O

What is 2HCl + Ca(OH)2 -> CaCl2 + 2H2O