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Cumulative Exam — Cumulative exam Answers

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Hsaio manages the finances for her company and has a particularly large amount of money budgeted for the purchase of calcium chloride, or CaCl2. Which type of company does Hsaio most likely own?

A
a snow-plowing service
B
a cosmetics factory
C
a pottery art studio
D
a catering business
42
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A car has a mass of 1,200 kg. What is its acceleration when the engine exerts a force of 600 N? (Formula: F=ma)

A
0.5 m/s2
B
2 m/s2
C
600 m/s2
D
1,800 m/s2
43

In an investigation, the atoms of a certain substance lose energy during a change of state. Before the change, the atoms are far apart and move constantly at high speeds and in all directions. After the change, the atoms are close together but are able to slide past one another.Use the diagram that shows changes of state between solid, liquid, and gas to answer the question.

Question illustration
A
L
B
N
C
O
D
P
44

This chart lists four elements from the periodic table.Atoms from which two elements would form ionic bonds?

Question illustration
A
calcium and gold
B
gold and argon
C
argon and iodine
D
iodine and calcium
45

Covalent bonds tend to make atoms more stable by helping them

A
fill up their innermost electron shell.
B
fill up their outermost electron shell.
C
empty out their innermost electron shell.
D
empty out their outermost electron shell.
46

Which statement best describes the equation CaCO3 + 2HCl → CaCl2 + CO2 + H2O?

A
CaCO3 is a reactant; it is present before the reaction occurs.
B
CaCl2 is a reactant; it is present before the reaction occurs.
C
CO2 is a reactant because it is most likely a gas.
D
H2O is a reactant because it is most likely a liquid.
47

Which element is a halogen?

A
chlorine (Cl)
B
oxygen (O)
C
carbon (C)
D
radon (Rn)
48

How does Bohr’s model of the atom compare with Thomson’s model?

A
They both describe atoms as small, indivisible spheres.
B
They both describe electrons as moving around the nucleus.
C
They both describe electrons as being surrounded by the positive matter.
D
They both describe atoms as being made up of positive and negative matter.
49

Cellular respiration is a biological process in which glucose is broken down to form energy in the form of ATP. The reactants have a starting energy of 3564 kilojoules of energy, and the products have a resulting 2878 kilojoules of energy.Which best describes cellular respiration?

A
It is an exothermic reaction because energy is lost.
B
It is an exothermic reaction because energy is gained.
C
It is an endothermic reaction because energy is lost.
D
It is an endothermic reaction because energy is gained.
50

Carlos is making phosphorus trichloride using the equation below. 2P +3Cl2 _PCl3What coefficient of PCl3 would show that the law of the conservation of mass is represented in the chemical equation?

Question illustration
A
4
B
3
C
2
D
1

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