Lesson 1
Lesson 2
Lesson 3
Random
100
A chemical reaction that absorbs energy in the form of heat is described as
endothermic
100
What type of reaction is
FeS + 2 HCl FeCl2 + H2S?
Replacement Reaction
100
Every chemical reaction involves a change in
energy
100
The amount of matter in a chemical reaction changes.
True or False
False
200
In chemical reactions, what does the principle of conservation of mass mean?
Matter is not created or destroyed
200
The substances listed on the left side of a chemical equation are the
reactants
200
The only sure evidence for a chemical reaction is
the formation of a new substance
200
What is Chemistry?
The study of matter and how matter changes.
300
What happens when chemical bonds break and new bonds form?
A chemical change
300
What reaction is the process of making a more complex compound FROM simpler substances
Synthesis
300
The minimum amount of energy needed to start a reaction is the
activation energy
300
Which two processes or reactions could be considered opposites?
Sythesis and Decomposition
400
CaCO3 represents a chemical
formula
400
A bottle of hydrogen peroxide that eventually turns into a bottle of water and oxygen gas is an example of what type of reaction?
Decomposition
400
A material used to decrease the rate of a chemical reaction is a(n)
inhibitor
400
Balance this chemical equation:
KClO3 ------->KCl + O2
2KClO3-----> 2KCl + 3O2