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SW M3 Basic Science Unit 5 Review

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Last updated over 2 years ago
20 questions
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Question 1
1.

The diagram above shows different kinds of changes in a chemical reaction, and many of these changes can be seen with the human eye. How do we know something is a chemical reaction if we cannot see a change in the substance?

Question 2
2.
In a chemical reaction, atoms of elements or compounds _______ and form _______ elements or _______ .
Question 3
3.

Match the four types of chemical reactions to their definition.

Draggable itemarrow_right_altCorresponding Item
Replacement
arrow_right_alt
A chemical reaction where two or more substances combine to form a single compound.
Combustion
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One compounds breaks down into two or more substances.
Synthesis
arrow_right_alt
Elements or ions switch places with the present elements or ions.
Decomposition
arrow_right_alt
A substance combines with oxygen and releases energy.
Question 4
4.

What is the type of chemical reaction that absorbs thermal energy?

Question 5
5.
Put the options below in order for the general chemical equation structure.
Other Answer Choices:
product
product
reactant
reactant
Question 6
6.
The _______ of an equation shows you the amount of a specific element.
Question 7
7.

A single-replacement chemical reaction is a reaction where one element replaces another element or compound.

Question 8
8.

Draw the products of the formula showing a double-replacement chemical reaction.
❤️ 🟩 + 🔷 🟣 -->

Question 9
9.

What is the Law of Conservation of Mass?

Question 10
10.

Combining hydrogen and oxygen to form water is an example of which kind of chemical reaction?

Question 11
11.
The starting substances in a chemical reaction are _______ . The substances produced by the chemical reaction are _______ .
Question 12
12.

Match the definitions of precipitate (verb) and a precipitate (noun).

Draggable itemarrow_right_altCorresponding Item
Precipitate (verb)
arrow_right_alt
clouds becoming too heavy to hold any more water, the the water vapor turns into liquid and falls to the ground.
Precipitate (noun)
arrow_right_alt
When two liquids combine to become a solid.
Question 13
13.

Match the substances to what they are showing, and if it is a single element or a chemical formula.

Draggable itemarrow_right_altCorresponding Item
Li
arrow_right_alt
Element
He
arrow_right_alt
Element
Au
arrow_right_alt
Element
H2O2
arrow_right_alt
Chemical Formula
NaCl
arrow_right_alt
Chemical Formula
Mg(OH)2
arrow_right_alt
Chemical Formula
Question 14
14.

Why do all chemical reactions conserve energy?

Question 15
15.

Why does a chemical reaction, such as setting off a firework, have a faster reaction rate?

Question 16
16.

Why is getting sick with the flu bacteria an example of an inhibitor?

Question 17
17.

Balance this equation, and rewrite the balanced formula in the drawing attached:
FeO2 + Cl --> Fe + Cl4O2

Question 18
18.

Balance this equation, and rewrite the balanced formula in the drawing attached:
Cu + H2SO4 + Fe3Li --> CuSO4 + H2OLi2 + Fe2

Question 19
19.

Balance this equation, and rewrite the balanced formula in the drawing attached:
Fe3Ag8 + O2 --> FeO2 + Ag2O

Question 20
20.

Balance this equation, and rewrite the balanced formula in the drawing attached:
P4O10 + Zn2Xe --> Zn3P + O5 + Xe