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Chemical Reactions
Classifying chemical Reactions
Balancing chemical Equations
Chemical Reactions and Energy
Miscellaneous
100

What do subscripts tell you in a chemical formula?

The number of atoms

100

The ability to burn is also known as what?

Supports combustion

100
Why do we balance chemical equations.
To make the Law of Conservation of Mass true.
100
All chemical reactions involve a change in what?
Energy
100

Need some help?

You get 2 100pt bonuses to put wherever you want.

200
Where are the reactants located in a chemical equation?
To the left of the arrow
200
The chemical reaction between iron and the water vapor in the air results in?

Rust

200
Is the following equation balanced LiCl → Li + Cl2
No
200
A chemical Reaction that absorbs energy (feels Cold) is called a ____________ _______________?
Endothermic Reaction
200
In a chemical reaction, the mass of the reactants is __________ to the mass of the products.
equal
300
Where are the products located in a chemical Equation?
To the right of the arrow
300

Double Points!!!

Name all 5 evidences of a chemical change.

Color change, gas production, light production, temp change, precipitation

300
Is the following equation balanced? Fe + 3H2(SO4) →Fe(SO4)3 + 3H2
Yes
300
A chemical reaction that gives off energy is called a ____________ ____________?
Exothermic Reaction
300
In a chemical reaction ____________ _________ are broken or formed.
Chemical Bonds
400
What is the purpose of a chemical equation?
To describe a chemical reaction using chemical formulas and symbols.
400

You use your ____________ to observe physical properties

Senses

400
What do we place in front of chemical formulas to balance equations? What does this thing tell us about a chemical equation?
Coefficient. Represents the number o funits of each substance in a reaction.
400

Photosynthesis would classify as which type of reaction?

Endothermic

400
What is a precipitate?
A solid that is formed in a chemical reaction.
500
What does the Law of Conservation of Mass state?
in a chemical reaction, matter is not created or destroyed, gained or lost.
500

Uh oh...

You automatically gain 500 points.

500

Balance the following equation CO2 + H2O --> C6H12O6 + 6O2

6CO2 + 6H2O --> C6H12O6 + 6O2

500

What does an inhibitor do to a chemical reaction? (Didn't go over it, but try your best)

Slows down a chemical reaction

500
Is a change in state of matter a chemical or physical change?
Physical.