Chemistry 101 chapters 2-5 Exam
Question 1
2 out of 2 points
What is the formula for an ionic compound made of carbon and oxygen?
Selected
Answer: Carbon and oxygen do not form an ionic
compound.
Answers: CO2
C 2O
CO
CO3
Carbon and oxygen do not form an ionic
compound.
Question 2
2 out of 2 points
From the following list of substances and heat capacities, choose the one
that will have the lowest temperature after absorbing 100.0 kJ of heat.
Assume identical masses of each substance start at the same initial
temperature.
Selected
Answer: water -4.18 J/g· °C
Answers: lead -0.128 J/g· °C
copper -0.385 J/g·
°C
ethanol -2.42 J/g·
°C
water -4.18 J/g· °C
not enough
information
Question 3
2 out of 2 points
Which of the following items is a physical property?
Selected
Answer: the odor of spearmint gum
Answers: the corrosive action of acid rain
on granite
, Chemistry 101 chapters 2-5 Exam
the odor of spearmint gum
the combustion of gasoline
the tarnishing of a copper statue
none of these
Question 4
2 out of 2 points
The exponential 101 is equal to which decimal number?
Selected
Answer: 10
Answers:
10
100
1,000
10,000
none of
these
Question 5
2 out of 2 points
What is the correct formula for a potassium ion with 18 electrons?
Selected
Answer: K+
Answers: P+
K+
K-
P-
none of the
above
Question 6
2 out of 2 points
Which of the statements about the discovery of electrons is FALSE?
Selected
Answer: Rutherford proved the plum-pudding model correct.
Answers: Because atoms are neutral, the existence of a negatively
charged particle implied there must be a positively charged
, Chemistry 101 chapters 2-5 Exam
component of an atom.
Thomson proposed that electrons were small particles held
within a positively charged sphere.
Rutherford proved the plum-pudding model correct.
The negatively charged electron is located outside the nucleus.
All of the above statements are true.
Question 7
2 out of 2 points
Which statement reflects the results of Rutherford's gold foil experiments?
Selected
Answer: Most all of the alpha particles passed directly through the foil.
Answers: Most all of the alpha particles were deflected back in the
direction from which they came.
Many alpha particles sputtered gold atoms off of the surface
of the foil.
Many alpha particles were deflected while passing through
the foil.
Most all of the alpha particles passed directly through the foil.
none of the above
Question 8
2 out of 2 points
What is the name of the compound made from lithium and oxygen?
Selected
Answer: lithium
oxide
Answers: lithium
dioxide
lithium(I)
oxide
oxygen
lithide
lithium
oxide
Question 1
2 out of 2 points
What is the formula for an ionic compound made of carbon and oxygen?
Selected
Answer: Carbon and oxygen do not form an ionic
compound.
Answers: CO2
C 2O
CO
CO3
Carbon and oxygen do not form an ionic
compound.
Question 2
2 out of 2 points
From the following list of substances and heat capacities, choose the one
that will have the lowest temperature after absorbing 100.0 kJ of heat.
Assume identical masses of each substance start at the same initial
temperature.
Selected
Answer: water -4.18 J/g· °C
Answers: lead -0.128 J/g· °C
copper -0.385 J/g·
°C
ethanol -2.42 J/g·
°C
water -4.18 J/g· °C
not enough
information
Question 3
2 out of 2 points
Which of the following items is a physical property?
Selected
Answer: the odor of spearmint gum
Answers: the corrosive action of acid rain
on granite
, Chemistry 101 chapters 2-5 Exam
the odor of spearmint gum
the combustion of gasoline
the tarnishing of a copper statue
none of these
Question 4
2 out of 2 points
The exponential 101 is equal to which decimal number?
Selected
Answer: 10
Answers:
10
100
1,000
10,000
none of
these
Question 5
2 out of 2 points
What is the correct formula for a potassium ion with 18 electrons?
Selected
Answer: K+
Answers: P+
K+
K-
P-
none of the
above
Question 6
2 out of 2 points
Which of the statements about the discovery of electrons is FALSE?
Selected
Answer: Rutherford proved the plum-pudding model correct.
Answers: Because atoms are neutral, the existence of a negatively
charged particle implied there must be a positively charged
, Chemistry 101 chapters 2-5 Exam
component of an atom.
Thomson proposed that electrons were small particles held
within a positively charged sphere.
Rutherford proved the plum-pudding model correct.
The negatively charged electron is located outside the nucleus.
All of the above statements are true.
Question 7
2 out of 2 points
Which statement reflects the results of Rutherford's gold foil experiments?
Selected
Answer: Most all of the alpha particles passed directly through the foil.
Answers: Most all of the alpha particles were deflected back in the
direction from which they came.
Many alpha particles sputtered gold atoms off of the surface
of the foil.
Many alpha particles were deflected while passing through
the foil.
Most all of the alpha particles passed directly through the foil.
none of the above
Question 8
2 out of 2 points
What is the name of the compound made from lithium and oxygen?
Selected
Answer: lithium
oxide
Answers: lithium
dioxide
lithium(I)
oxide
oxygen
lithide
lithium
oxide
