chm101_exam3 Question and
answers 100% correct 2025/2026
Question 1
2 out of 2 points
What is the final volume of a balloon that was initially 500.0 mL at 25
°C and was then heated to 50 °C ?
Selected
Answer:
542 mL
Answers: none of these
542 mL
193 mL
1.00 L
461 mL
• Question 2
2 out of 2
Which molecule listed below has a nonpolar covalent points
bond?
Selected
Answer:
H2
Answers: all of the compounds
none of the compounds
NaCl
H2
H2O 2 out of 2
points
• Question 3
Which of the following is considered a single electron
group?
Selected
Answer:
all of these
Answers:
all of these
a lone pair of
electrons a triple
,bond
a single
bond a
double bond
, Question 4
2 out of 2 points
The tragedy at Lake Nyos in Cameroon, West Africa, was caused by:
Select ed
Answe
the release of excessive amounts of carbon dioxide that had been
r: dissolved in the water at the bottom of the lake.
Answ
e rs: the release of excessive amounts of oxygen gas that
had been dissolved in the water at the bottom of the
lake.
the release of excessive amounts of carbon dioxide that
had been dissolved in the water at the bottom of the
lake.
the release of excessive amounts of nitrogen gas that had
been dissolved in the water at the bottom of the lake.
the release of excess water stored in the volcanic lake
which flooded the village below.
none of these
• Question 5
2 out of 2 points
Ammonia gas decomposes according to the equation: 2NH3(g) →
N2(g) + 3H2(g) If 15.0 L of nitrogen is formed at STP, how many
liters of hydrogen will be produced (also measured at STP)?
Selected
Answer:
45.0
L
Answers: 15.0 L
30.0 L
45.0 L
90.0 L
not enough information
• Question 6
2 out of 2 points
How many kilojoules of heat are needed to completely vaporize 42.8
grams of C4H10O at its boiling point?
Given ΔHvap = 26.5kJ/mol
Selected
Answer:
15.3
answers 100% correct 2025/2026
Question 1
2 out of 2 points
What is the final volume of a balloon that was initially 500.0 mL at 25
°C and was then heated to 50 °C ?
Selected
Answer:
542 mL
Answers: none of these
542 mL
193 mL
1.00 L
461 mL
• Question 2
2 out of 2
Which molecule listed below has a nonpolar covalent points
bond?
Selected
Answer:
H2
Answers: all of the compounds
none of the compounds
NaCl
H2
H2O 2 out of 2
points
• Question 3
Which of the following is considered a single electron
group?
Selected
Answer:
all of these
Answers:
all of these
a lone pair of
electrons a triple
,bond
a single
bond a
double bond
, Question 4
2 out of 2 points
The tragedy at Lake Nyos in Cameroon, West Africa, was caused by:
Select ed
Answe
the release of excessive amounts of carbon dioxide that had been
r: dissolved in the water at the bottom of the lake.
Answ
e rs: the release of excessive amounts of oxygen gas that
had been dissolved in the water at the bottom of the
lake.
the release of excessive amounts of carbon dioxide that
had been dissolved in the water at the bottom of the
lake.
the release of excessive amounts of nitrogen gas that had
been dissolved in the water at the bottom of the lake.
the release of excess water stored in the volcanic lake
which flooded the village below.
none of these
• Question 5
2 out of 2 points
Ammonia gas decomposes according to the equation: 2NH3(g) →
N2(g) + 3H2(g) If 15.0 L of nitrogen is formed at STP, how many
liters of hydrogen will be produced (also measured at STP)?
Selected
Answer:
45.0
L
Answers: 15.0 L
30.0 L
45.0 L
90.0 L
not enough information
• Question 6
2 out of 2 points
How many kilojoules of heat are needed to completely vaporize 42.8
grams of C4H10O at its boiling point?
Given ΔHvap = 26.5kJ/mol
Selected
Answer:
15.3
