CEM 141 FINAL EXAM LATEST 2026 MICHIGAN
STATE UNIVERSITY 100% ACCUTARE SPRING-
SUMMER 50 QUESTIONS (GRADED A)
Which of the following contain(s) atoms?
a. Heat
b. Light
c. Energy
d. Dust
e. All of the above
All of the above
The diagram below shows alpha particles being fired at a piece of gold foil. Where will the
majority of the alpha particles be detected (point I, II, or III) and why?
IV. Alpha particles bounce off the nuclei within the gold atoms because the nuclei are much
more massive than the alpha particles.
V. The alpha particles are repelled when they come close to the nuclei because both are
charged.
VI. The alpha particles go straight through the atom because it is mostly empty space.
III because the alpha particles go straight through the atom because it is mostly empty space.
Thomson's cathode ray tube experiment proved FALSE what part of Dalton's atomic theory?
a. All atoms are indivisible and indestructible
b. All atoms of a given element are identical
c. All matter is made of atoms.
d. Compounds are formed from the combination of two or more elements.
e. Chemical reactions are rearranging of atoms
All atoms are indivisible and indestructable
When a covalent bond is formed between two nitrogen atoms:
I. Energy is absorbed
II. Energy is released
III. A molecule is formed
IV. The nitrogen changes from the gaseous to liquid state.
,II and III: energy is released and a molecule is formed
The London dispersion force between two neon atoms compared to the London dispersion
force between two argon atoms where both systems are the most stable is:
I. the same
II. stronger
III. weaker
Because:
IV. They are both noble gases.
V. Neon has a smaller electron cloud, therefore there will be a smaller separation of charge
resulting in a weaker force.
VI. Neon has a smaller electron cloud, therefore there will be a larger separation of charge
resulting in a stronger force.
III and V: weaker, because neon has a smaller electron cloud, therefore there will be a smaller
separation of charge resulting in a weaker force
Is the following statement true or false?
When chlorine freezes, London dispersion forces are formed.
This statement is
I. True
II. False
Because
III. When a substance freezes, covalent bonds are formed.
IV. There are LDFs in both the solid state and the liquid state, but more in the solid state.
V. There are LDFs in the solid state, but not in the liquid state.
I and IV: true, because there are LDFs in both the solid and the liquid state, but more in the solid
state
Which do you predict to have the higher boiling point, fluorine (F2) or neon (Ne) and why?
a. Ne, because the smaller atoms are packed more tightly together and harder to break
apart.
b. Ne, because the LDFs between neon atoms are stronger, requiring more energy to
overcome.
c. F2, because the covalent bonds between fluorine atoms are stronger, requiring more
energy to overcome.
d. F2, because the LDFs between fluorine molecules are stronger, requiring more energy to
overcome.
d. F2, because the LDFs between fluorine molecules are stronger, requiring more energy to
overcome.
, How many hydrogen atoms are there in one mole of CH2Cl2
a. I H atom
b. 2 H atoms
c. 5 H atoms
d. 6.022 x 10^23 H atoms
e. 1.204 x 10^24 H atoms
f. 3.011 x 10^24 H atoms
e. 1.204 x 10^24 H atoms
Ammonia reacts with oxygen to produce nitric oxide and water. Balance the equation using
small, whole number coefficients:
___ NH3 + ___ O2 ___ NO + ___ H2O
What is the coefficient for oxygen (O2)?
a. 1
b. 2
c. 4
d. 5
e. 6
f. 10
d. 5
Hydrogen reacts with oxygen to produce water according to the following equation:
2 H2 + O2 → 2 H2O
You start a reaction with 53 grams of H2 and excess O2 and you end up producing 400 grams
of H2O. What is the percent yield for this reaction?
a. 13%
b. 42%
c. 57%
d. 84%
e. 100%
f. 119%
d. 84%
STATE UNIVERSITY 100% ACCUTARE SPRING-
SUMMER 50 QUESTIONS (GRADED A)
Which of the following contain(s) atoms?
a. Heat
b. Light
c. Energy
d. Dust
e. All of the above
All of the above
The diagram below shows alpha particles being fired at a piece of gold foil. Where will the
majority of the alpha particles be detected (point I, II, or III) and why?
IV. Alpha particles bounce off the nuclei within the gold atoms because the nuclei are much
more massive than the alpha particles.
V. The alpha particles are repelled when they come close to the nuclei because both are
charged.
VI. The alpha particles go straight through the atom because it is mostly empty space.
III because the alpha particles go straight through the atom because it is mostly empty space.
Thomson's cathode ray tube experiment proved FALSE what part of Dalton's atomic theory?
a. All atoms are indivisible and indestructible
b. All atoms of a given element are identical
c. All matter is made of atoms.
d. Compounds are formed from the combination of two or more elements.
e. Chemical reactions are rearranging of atoms
All atoms are indivisible and indestructable
When a covalent bond is formed between two nitrogen atoms:
I. Energy is absorbed
II. Energy is released
III. A molecule is formed
IV. The nitrogen changes from the gaseous to liquid state.
,II and III: energy is released and a molecule is formed
The London dispersion force between two neon atoms compared to the London dispersion
force between two argon atoms where both systems are the most stable is:
I. the same
II. stronger
III. weaker
Because:
IV. They are both noble gases.
V. Neon has a smaller electron cloud, therefore there will be a smaller separation of charge
resulting in a weaker force.
VI. Neon has a smaller electron cloud, therefore there will be a larger separation of charge
resulting in a stronger force.
III and V: weaker, because neon has a smaller electron cloud, therefore there will be a smaller
separation of charge resulting in a weaker force
Is the following statement true or false?
When chlorine freezes, London dispersion forces are formed.
This statement is
I. True
II. False
Because
III. When a substance freezes, covalent bonds are formed.
IV. There are LDFs in both the solid state and the liquid state, but more in the solid state.
V. There are LDFs in the solid state, but not in the liquid state.
I and IV: true, because there are LDFs in both the solid and the liquid state, but more in the solid
state
Which do you predict to have the higher boiling point, fluorine (F2) or neon (Ne) and why?
a. Ne, because the smaller atoms are packed more tightly together and harder to break
apart.
b. Ne, because the LDFs between neon atoms are stronger, requiring more energy to
overcome.
c. F2, because the covalent bonds between fluorine atoms are stronger, requiring more
energy to overcome.
d. F2, because the LDFs between fluorine molecules are stronger, requiring more energy to
overcome.
d. F2, because the LDFs between fluorine molecules are stronger, requiring more energy to
overcome.
, How many hydrogen atoms are there in one mole of CH2Cl2
a. I H atom
b. 2 H atoms
c. 5 H atoms
d. 6.022 x 10^23 H atoms
e. 1.204 x 10^24 H atoms
f. 3.011 x 10^24 H atoms
e. 1.204 x 10^24 H atoms
Ammonia reacts with oxygen to produce nitric oxide and water. Balance the equation using
small, whole number coefficients:
___ NH3 + ___ O2 ___ NO + ___ H2O
What is the coefficient for oxygen (O2)?
a. 1
b. 2
c. 4
d. 5
e. 6
f. 10
d. 5
Hydrogen reacts with oxygen to produce water according to the following equation:
2 H2 + O2 → 2 H2O
You start a reaction with 53 grams of H2 and excess O2 and you end up producing 400 grams
of H2O. What is the percent yield for this reaction?
a. 13%
b. 42%
c. 57%
d. 84%
e. 100%
f. 119%
d. 84%
