AnswersCA 2026 ChemistryChemical Bonding and Reactions

Practice Test Answers

12 verified answers
1
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The balanced equation shows how sodium chloride reacts with silver nitrate to form sodium nitrate and silver chloride. NaCl plus AgNO sub 3 rightarrow NaNO sub 3 plus AgCl If 4 point 0 0 g of NaCl react with 10 point 0 0 g of AgNO sub 3 , what is the excess reactant?

A
AgNO sub 3
B
NaCl
C
AgCl
D
NaNO sub 3
2
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Which best describes why NH sub 4 raised to the plus power can form an ionic bond with Cl raised to the negative power ?

A
It has a negative charge that is spread over the entire ion.
B
It has a nitrogen atom that is strongly attracted to Cl raised to the negative power .
C
Its positive charge is attracted to the negative charge of Cl raised to the negative power .
D
Its outermost shell gains one or more electrons from Cl raised to the negative power .
3

If a substance reacts with oxygen, the chemical reaction is most likely a

A
decomposition reaction.
B
combustion reaction.
C
single replacement reaction.
D
double replacement reaction.
4

Which statement is true about a polyatomic ion?

A
It forms covalent bonds with other ions.
B
It is made of atoms that are covalently bonded together.
C
It has a charge that is distributed over only part of the ion.
D
It forms metallic bonds with other ions.
5

Based on its location in the periodic table, what can most likely be predicted about sulfur?

A
It has four valence electrons available for bonding.
B
It has four nonbonding electrons.
C
It has six nonbonding electrons.
D
It has six valence electrons available for bonding.
6

Sodium combines with water to produce sodium hydroxide and hydrogen gas. Which word equation represents this violent reaction?

A
sodium plus water rightarrow sodium hydroxide plus hydrogen
B
sodium hydroxide plus water rightarrow sodium plus hydrogen
C
sodium plus sodium hydroxide rightarrow water plus hydrogen
D
sodium plus hydrogen rightarrow sodium hydroxide plus water
7

What does it mean that valence electrons in a metal are delocalized?

A
The valence electrons move from inner orbitals to outer orbitals of each atom.
B
The valence electrons move out of the orbitals and go into the air.
C
The valence electrons move between atoms in shared orbitals.
D
The valence electrons move from outer orbitals to inner orbitals of each atom.
8

The equation represents the combustion of sucrose. cap c sub 12 cap h sub 22 cap o sub 11 plus 12 cap o sub 2 rightarrow 12 CO sub 2 plus 11 cap h sub 2 cap o If there are 10 point 0 g of sucrose and 8 point 0 g of oxygen, how many moles of sucrose are available for this reaction?

A
0 point 3 5 1 mol
B
0 point 0 2 9 mol
C
3 point 0 0 mol
D
0 point 2 5 0 mol
9

What is another name for the molecular orbital theory of bonding in metals?

A
band theory
B
ionic bond theory
C
electron bond theory
D
covalent bond theory
10

Propane burns in air to produce carbon dioxide and water. What is this type of chemical reaction called?

A
combustion
B
decomposition
C
single replacement
D
synthesis
11

How many valence electrons are available for bonding in bromine Br ?

A
one
B
two
C
five
D
seven
12

This formula equation is unbalanced. BaCl sub 2 times aq plus Na sub 2 CO sub 3 aq rightarrow BaCO sub 3 times s plus NaCl times aq Which coefficient should be placed in front of NaCl to balance this equation?

A
1
B
2
C
3
D
4

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