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More Chemical Reaction Review
Test Description: More review for the chemical reaction quiz
Instructions: Answer all questions to get your test result.
1) What does the law of conservation of mass mean during a chemical reaction?
A
The total mass of the reactants is greater than the total mass of the products.
B
The total mass of the reactants is the same as the total mass of the products.
C
The total mass of the reactants is less than the total mass of the products.
D
The total mass of the reactants and products cannot be measured.
2) A chemical reaction in which heat energy is given off.
A
Endothermic reaction
B
Homogeneous mixture
C
Precipitate
D
Exothermic reaction
3) A mixture that is evenly mixed; also called a solution.
A
Heterogeneous
B
Homogeneous
C
Compound
D
Precipitate
4) A pure substance that is created by 2 or more elements chemically reacting and joining together.
A
Heterogeneous mixture
B
Homogeneous mixture
C
Element
D
Compound
5) The number attached to an element’s symbol in a chemical formula that cannot be changed or added is called a
A
reactant.
B
product.
C
coefficient.
D
subscript.
6) If the reactants contain 12 carbon atoms and 4 oxygens atoms, what must be true of the products?
A
The product must consist of carbon to oxygen atoms in a 1:1 ratio
B
The product must contain 12 carbon atoms and 4 oxygen atoms.
C
The product must contain 4 carbon atoms and 12 oxygen atoms.
D
The products must contain a total of 16 atoms.
7) A material that increases the rate of a reaction by lowering the activation energy.
A
Inhibitor
B
Temperature
C
Precipitate
D
Catalyst
8) A mixture that is unevenly mixed.
A
Heterogeneous
B
Compound
C
Homogeneous
D
Element
9) A chemical reaction in which heat energy is absorbed.
A
Endothermic reaction
B
Synthesis
C
Exothermic reaction
D
Decomposition
10) When two elements in different compounds trade places.
A
Single replacement
B
Synthesis
C
Exothermic reaction
D
Double replacement
*select an answer for all questions
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