Chemistry: Matter and Change

Section 1: Reactions and Equations

Self Check Quizzes

1
Which of the following observations could be an indication of a chemical reaction of antimony?
A)It is a solid at room temperature.
B)It melts at 631°C.
C)It expands upon freezing.
D)It burns in an atmosphere of chlorine.
2
The _________ symbol separates the reactants from the products and means "to yield".
A)+
B)(s)
C)
D)(g)
3
A balanced chemical equation is a direct presentation of the ___________.
A)law of conservation of momentum
B)law of conservation of energy
C)law of conservation of mass
D)ideal gas law
4
Which of the following is the correct word equation for the chemical reaction shown above?

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A)Aqueous aluminum and bromine gas react to produce solid aluminum bromide.
B)Solid aluminum and aqueous bromine react to produce solid aluminum bromide.
C)Solid aluminum and bromine gas react to produce solid aluminum bromide.
D)Aqueous aluminum and bromine gas react to produce aqueous aluminum bromide.
5
Balance the chemical equation shown above. What is the coefficient in front of O2(g)?

Fe(s) + O2(g) → Fe(2)O3(s)
A)2
B)3
C)4
D)5
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