AnswersChemistryChemical Bonding and Reactions

Chemical Bonding and Reactions — Test Answers

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21
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What happens as the activation energy increases?

A
The reactant surface area decreases.
B
The pressure of the system decreases.
C
The reaction begins to slow down.
D
The kinetic energy of colliding molecules changes.
22
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Which reaction will most likely take place based on the activity series? Li is greater than cap k comma cap k is greater than Ba comma Ba is greater than Ca comma Ca is greater than Na comma Na is greater than Mn comma Mn is greater than Zn comma Zn is greater than Cr comma Cr is greater than Fe comma Fe is greater than Cd comma Cd is greater than Ni comma Ni is greater than cap h comma cap h is greater than Sb comma Sb is greater than Cu comma Cu is greater than Ag comma Ag is greater than Pd comma Pd is greater than Hg comma Hg is greater than Pt

A
Mn plus CaO rightarrow
B
Pt plus FeCl sub 3 rightarrow
C
Cu plus 2 KNO sub 3
D
Li plus ZnCO sub 3 rightarrow
23

Which energy graph represents the nonspontaneous transition of graphite into diamond?

A
Image with description A graph with Reaction progression on the horizontal axis and energy on the vertical axis. A line starts low on the vertical axis, runs briefly parallel to the horizontal axis, slopes up sharply, curves down a short distance, and levels out.
B
Image with description A graph with reaction progression on the horizontal axis and energy on the vertical axis. A line starts midway up the vertical axis, runs briefly parallel to the horizontal axis, slopes up a small amount, then curves down to level out below the initial starting point.
C
Image with description A graph with reaction progression on the horizontal axis and energy on the vertical axis. A line starts midway up the vertical axis, runs briefly parallel to the horizontal axis, slopes up a moderate amount, then curves down sharply to level out below the initial starting point.
D
Image with description A graph with reaction progression on the horizontal axis and energy on the vertical axis. A line starts midway up the vertical axis, runs briefly parallel to the horizontal axis, slopes up sharply, curves down sharply, and levels out below the initial starting point.
24

What is the word equation for atoms of magnesium reacting with molecules of oxygen to produce magnesium oxide?

A
magnesium plus oxygen rightarrow magnesium plus oxygen
B
magnesium plus oxygen rightarrow magnesium oxide
C
magnesium oxide plus oxygen rightarrow magnesium
D
magnesium plus magnesium oxide rightarrow oxygen
25

Which shows the correct relationship between the molecular formula and the empirical formula for cap c sub 2 cap h sub 10 cap n sub 2 ?

A
empirical formula is equal to 14 times molecular formula
B
empirical formula is equal to 2 times molecular formula
C
molecular formula is equal to 2 times empirical formula
D
molecular formula is equal to 62 point 1 times empirical formula

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