AMU CHEM 134 STUDY GUIDE
QUESTIONS AND ANSWERS WITH
COMPLETE SOLUTIONS 100%
CORRECT RATED A+
Question: How could you experimentally determine whether the outdoor
temperature is above or below the freezing point of water (0 °C 32 °F)without
using any type of thermometer?
Answer: ✔✔ You can place a small container of liquid water outside and observe
it after some time. If the water solidifies into ice, the temperature is below $0\text{
}\degree\text{C}$; if it remains a liquid, the temperature is above freezing.
Question: Classify each of the following scientific statements as a hypothesis, a
law, or a theory, and provide the reasoning behind your choice:
(a) The pressure exerted by a contained gas sample increases proportionally with a
rise in its temperature.
(b) All matter is composed of minute particles that bind together in fixed
proportions to create distinct substances.
(c) Elevating the temperature of water allows solid solutes, like sugar or salt, to
dissolve more efficiently.
Answer: ✔✔
(a) Law: This statement describes a consistently observed natural
phenomenon and outlines a predictable relationship, which can be
mathematically proven under set conditions.
(b) Theory: This is a broad, deeply substantiated, and universally accepted
explanation that describes why and how matter behaves the way it does.
(c) Hypothesis: This is a tentative, testable statement or educated guess
regarding a specific observation that can be supported or refuted through
further experimentation.
,Identify each of the underlined items as a part of either the macroscopic domain,
the microscopic domain, or the symbolic domain of chemistry.
For those in the symbolic domain, indicate whether they are symbols for a
macroscopic or a microscopic feature.
a.) The mass of a lead pipe is 14 lb.
b.)The mass of a certain chlorine atom is 35 amu.
c.)A bottle with a label that reads Al contains aluminum metal.
d.) Al is the symbol for an aluminum atom. - ANSWER......a.) macroscopic
b.) microscopic
c.) Symbolic; microscopic
d.) Symbolic; microscopic
Identify each of the underlined items as a part of either the macroscopic domain,
the microscopic domain, or the symbolic domain of chemistry. For those in the
symbolic domain, indicate whether they are symbols for a macroscopic or a
microscopic feature.
(a) A certain molecule contains one H atom and one Cl atom.
(b) Copper wire has a density of about 8 g/cm3.
(c) The bottle contains 15 grams of Ni powder.
(d) A sulfur molecule is composed of eight sulfur atoms. - ANSWER......(a)
symbolic, microscopic
(b) macroscopic
(c) symbolic, macroscopic
(d) microscopic
According to one theory, the pressure of a gas increases as its volume decreases
because the molecules in the gas have to move a shorter distance to hit the walls of
the container. Does this theory follow a macroscopic or microscopic description of
, chemical behavior? Explain your answer. - ANSWER......This theory follows
microscopic description molecules in the gas are determined on microscopic
properties
The amount of heat required to melt 2 lbs of ice is twice the amount of heat
required to melt 1 lb of ice. Is this observation a macroscopic or microscopic
description of chemical behavior? Explain your answer. - ANSWER......This is a
macroscopic observation.
Explanation:
When you have something that It is depends on the mass, you can be sure that this
is a macroscopic description of chemical behavior, because macroscopic
observation can be measured with extensive magnitudes such as volume, mass, and
length.
chemistry - ANSWER......study of the composition, properties, and interactions of
matter
hypothesis - ANSWER......tentative explanation of observations that acts as a guide
for gathering and checking information
law - ANSWER......statement that summarizes a vast number of experimental
observations, and describes or predicts some aspect of the natural world
macroscopic domain - ANSWER......realm of everyday things that are large
enough to sense directly by human sight and touch
microscopic domain - ANSWER......realm of things that are much too small to be
sensed directly
QUESTIONS AND ANSWERS WITH
COMPLETE SOLUTIONS 100%
CORRECT RATED A+
Question: How could you experimentally determine whether the outdoor
temperature is above or below the freezing point of water (0 °C 32 °F)without
using any type of thermometer?
Answer: ✔✔ You can place a small container of liquid water outside and observe
it after some time. If the water solidifies into ice, the temperature is below $0\text{
}\degree\text{C}$; if it remains a liquid, the temperature is above freezing.
Question: Classify each of the following scientific statements as a hypothesis, a
law, or a theory, and provide the reasoning behind your choice:
(a) The pressure exerted by a contained gas sample increases proportionally with a
rise in its temperature.
(b) All matter is composed of minute particles that bind together in fixed
proportions to create distinct substances.
(c) Elevating the temperature of water allows solid solutes, like sugar or salt, to
dissolve more efficiently.
Answer: ✔✔
(a) Law: This statement describes a consistently observed natural
phenomenon and outlines a predictable relationship, which can be
mathematically proven under set conditions.
(b) Theory: This is a broad, deeply substantiated, and universally accepted
explanation that describes why and how matter behaves the way it does.
(c) Hypothesis: This is a tentative, testable statement or educated guess
regarding a specific observation that can be supported or refuted through
further experimentation.
,Identify each of the underlined items as a part of either the macroscopic domain,
the microscopic domain, or the symbolic domain of chemistry.
For those in the symbolic domain, indicate whether they are symbols for a
macroscopic or a microscopic feature.
a.) The mass of a lead pipe is 14 lb.
b.)The mass of a certain chlorine atom is 35 amu.
c.)A bottle with a label that reads Al contains aluminum metal.
d.) Al is the symbol for an aluminum atom. - ANSWER......a.) macroscopic
b.) microscopic
c.) Symbolic; microscopic
d.) Symbolic; microscopic
Identify each of the underlined items as a part of either the macroscopic domain,
the microscopic domain, or the symbolic domain of chemistry. For those in the
symbolic domain, indicate whether they are symbols for a macroscopic or a
microscopic feature.
(a) A certain molecule contains one H atom and one Cl atom.
(b) Copper wire has a density of about 8 g/cm3.
(c) The bottle contains 15 grams of Ni powder.
(d) A sulfur molecule is composed of eight sulfur atoms. - ANSWER......(a)
symbolic, microscopic
(b) macroscopic
(c) symbolic, macroscopic
(d) microscopic
According to one theory, the pressure of a gas increases as its volume decreases
because the molecules in the gas have to move a shorter distance to hit the walls of
the container. Does this theory follow a macroscopic or microscopic description of
, chemical behavior? Explain your answer. - ANSWER......This theory follows
microscopic description molecules in the gas are determined on microscopic
properties
The amount of heat required to melt 2 lbs of ice is twice the amount of heat
required to melt 1 lb of ice. Is this observation a macroscopic or microscopic
description of chemical behavior? Explain your answer. - ANSWER......This is a
macroscopic observation.
Explanation:
When you have something that It is depends on the mass, you can be sure that this
is a macroscopic description of chemical behavior, because macroscopic
observation can be measured with extensive magnitudes such as volume, mass, and
length.
chemistry - ANSWER......study of the composition, properties, and interactions of
matter
hypothesis - ANSWER......tentative explanation of observations that acts as a guide
for gathering and checking information
law - ANSWER......statement that summarizes a vast number of experimental
observations, and describes or predicts some aspect of the natural world
macroscopic domain - ANSWER......realm of everyday things that are large
enough to sense directly by human sight and touch
microscopic domain - ANSWER......realm of things that are much too small to be
sensed directly
