AnswersChemistryChemical Reactions and Limiting Reactants

Practice Test Answers

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6

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

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

Iron reacts with oxygen to form iron oxide (rust) . Which best describes this statement?

A
Iron oxide is formed by rearranging atoms.
B
Iron oxide is the gaseous state of iron.
C
Iron oxide is made up of only iron atoms.
D
Iron oxide is the liquid state of iron.
8

What is the empirical formula for propene open paren cap c sub 3 cap h sub 6 close paren ?

A
cap c sub 4 cap h sub 8
B
cap c sub 2 cap h sub 4
C
cap c cap h sub 2
D
cap c sub 3 cap h sub 6
9

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

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

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Practice Test Answers — Chemistry