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Section 1: Reactions and Equations

Reactions and Equations

1.

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What is the correct word equation for the chemical equation 2Fe(s) + 3Cl2(g) → 2FeCl3(s)?
A)Aqueous iron and chlorine gas react to produce solid iron chlorate.
B)Aqueous iron and chlorine gas react to produce aqueous iron chlorate.
C)Solid iron and chlorine gas react to produce solid iron chlorate.
D)Solid iron and chlorine gas react to produce solid iron chloride.
2.
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.
3.
In the following unbalanced chemical reaction, which components are classified as the reactants?
C7H16 + O2 → CO2 + H2O
A)C7H16 and O2
B)C7H16 and CO2
C)C7H16 and H2O
D)CO2 and H2O
4.
The _________ symbol separates the reactants from the products and means "to yield".
A)+
B)(s)
C)→
D)(g)
5.
In a chemical equation, the number written in front of the chemical formula is the _________.
A)reactant
B)product
C)equation
D)coefficient
6.
When there are exactly the same number and type of atoms on both sides of a chemical equation, the equation is ____________.
A)balanced
B)ionic
C)synthetic
D)decomposed
7.
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
8.
Balance the following equation. What is the coefficient for hydrogen fluoride?
SiO2 + HF → SiF4 + H2O
A)1
B)2
C)3
D)4
9.
Consider the following balanced equation. Which one of the following statements is false?
A)One molecule of O2 will react with 2 molecules of H2.
B)One molecule of O2 will produce 2 molecules of H2O.
C)Two molecules of H2 will produce two molecules of H2O.
D)Two molecules of H2 will produce one molecule of H2O.
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