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Reactions Test 50
By Jonathan Klinginsmith
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Last updated about 6 years ago
33 questions
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Question 1
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Question 2
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Question 3
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Question 4
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Question 5
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Question 6
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Question 7
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Question 8
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Question 9
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Question 10
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Question 11
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Question 12
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Question 13
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Question 14
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Question 15
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Question 16
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Question 17
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Question 18
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Question 19
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Question 20
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Question 21
21.
Balance the equation
visibility
View drawing
Question 22
22.
Question 23
23.
Balance the equation
visibility
View drawing
Question 24
24.
Question 25
25.
Balance the equation
visibility
View drawing
Question 26
26.
Question 27
27.
Balance the equation
visibility
View drawing
Question 28
28.
Question 29
29.
Balance the equation
visibility
View drawing
Question 30
30.
Question 31
31.
Question 32
32.
Question 33
33.
Each substance to the right of the arrow in a chemical equation is a
product
reactant
The numbers that go before symbols and formulas in a chemical equation are
superscript
coefficients
Substances that speed up chemical reactions are called
reactants
catalysts
A blank chemical equation has the same number of atoms of each element on each side of the equation.
balanced
simple
If something is burned, a blank reaction has occurred.
single displacment
combustion
Why does an increase in temperature result in an increase in reaction rate?
it decreases the concentration of reactants
it causes an increase in the number of particle collisions
If energy must be ADDED to a chemical reaction for the reaction to take place, the reaction is blank.
endergonic
endothermic
In a chemical equation, this symbol means dissolved in water
L
AQ
What type of reaction needs oxygen and produces carbon dioxide and water vapor?
combustion
synthesis
NaOH and HCL produces NaCl + H20 is a double displacement reaction.
True
False
A teacher wants to demonstrate a chemical reaction for her students. Which activity would best demonstrate a chemical reaction?
placing metal in an acid to greate gas
filling a balloon with helium gas
When a wood fire burns, it releases heat into the environment. This type of reaction is blank.
endothermic
exothermic
The law of conservation of Mass states
mass is always lost during a chemical change
mass is not lost or created during a chemical change
Which of the following observation does NOT indicate that a chemical reaction has occurred?
Changes shape
heat and light released
Which situation provides the best evidence that a chemical reaction is taking place?
a solution freezes in the freezer
two solutions mixed in a beaker produce a solid
A substance that is an ingredient in a chemical reaction is called a blank.
product
reactant
Hydrogen reacts with oxygen to produce water; which substances are the reactants?
oxygen only
water only
both hydrogen and oxygen
The S symbol written after a formula in a chemical equation stands for blank?
solid
soluble
A solid produced from two liquids in a double displacment chemical reaction is called a blank.
precipitate
molecule
To balance a chemcial equation, it may be neccessary to adjust the
coefficents
subscripts
What type of reaction is number twenty one?
Double Replacement
Single Replacement
What type of reaction is number twenty three?
Synthesis
Decomposition
What type of reaction is number twenty five?
Synthesis
Single Replacement
What type of reaction is number twenty seven?
Double Replacement
Single Replacement
What type of reaction is number twenty nine?
Double Replacement
Single Replacement
The more concentrated a solution is, the slower the reaction rate
True
False
an Endothermic reaction absorbs energy
True
False
An exothermic reaction releases energy
True
False