CHM-113 EXAM 1 KITZMILLER QUESTIONS ANSWERED CORRECTLY GRADED A+
chemistry - Answers the study of matter and the changes that matter undergoes
matter - Answers the psychical material of the universe; anything that has mass and occupies
space.
property - Answers any characteristic that allows us to recognize a particular type of matter and
to distinguish from other types.
atoms - Answers the infinitesimal (submicroscopic) building blocks of matter
molecules - Answers two or more atoms joined in specific shape
states of matter - Answers gas, liquid, solid
gas - Answers has no fixed volume or shape; uniformly fills a container.
liquid - Answers distinct volume indépendant of its container; assumes the shape of the portion
of the container it occupies.
solid - Answers definite shape and definite volume
what is a pure substance? - Answers matter that has distinct properties and a composition that
does not vary from sample to sample. All substances are either elements of compounds.
What is an element? - Answers (on the molecular level) only composed of one kind of atom and
cannot be decomposed into similar substances.
what is a compound? - Answers substances composed of two or more elements (contain two or
more different kinds of atoms).
What is a mixture? - Answers a combination of two or more in which each retains its chemical
identity.
What 5 elements account for over 90% of the earth's crust? - Answers oxygen, silicon, aluminum,
iron, and calcium.
Law of definite proportions - Answers the elemental composition of a pure compound is always
the same, regardless of it's source.
What is a homogenous mixture? - Answers a mixture of substances that has a uniform
composition.
what is a heterogenous mixture? - Answers mixtures that are not uniform throughout.
what are the 2 different properties of matter? - Answers chemical and physical.
, physical change - Answers changes that occur with no change in chemical composition.
chemical change (chemical reaction) - Answers processes in which one or more substances are
converted into other substances.
changes of state - Answers changes of matter from one state to a different one; exp. gas to a
liquid. All changes of state are physical changes.
what system is used for scientific measurement? - Answers metric
what is a hypothesis? - Answers a tentative explanation of a series of observations or of natural
law.
in science, what is a theory? - Answers a tested model or explanation that satisfactorily
accounts for a certain set of phenomena.
what is scientific law? - Answers a concise verbal statement or a mathematical equations hat
summarizes a wide range of observations and experiences.
what is the difference between a theory and scientific law? - Answers scientific law is a
statement of what always happens whereas a theory is an explanation for what happens.
What are SI units? - Answers The preferred metric units for use in science. It has 7 base units
from which all other units are derived.
what is the SI base unit length? - Answers the meter (m)
what is the SI base unit of mass? - Answers the kilogram (kg)
what is the SI base unit of temperature? - Answers kelvin (K)
what is the SI base unit of time? - Answers seconds (s or sec)
what is the SI base unit of amount of substance? - Answers Mole (mol or M)
what is the absolute temperature scale? - Answers Kelvin. Zero (aka absolute zero) on the
Kelvin scale corresponds to -273.15 degrees Celsius. The freezing point of water is 273.15 K, or
0 degrees Celsius, or 32 degrees Fahrenheit.
what is an exact number? - Answers those whose values are known exactly; exp. the number of
people in a classroom, how many eggs in a dozen eggs, anything that can be counted exactly.
What is an inexact number? - Answers anything obtained by measurement.
what is precision? - Answers the closeness of agreement among several measurements of the
same quantity; the reproducibility of a measurement.
what is accuracy? - Answers a measure of how closely individual measurements agree with the
chemistry - Answers the study of matter and the changes that matter undergoes
matter - Answers the psychical material of the universe; anything that has mass and occupies
space.
property - Answers any characteristic that allows us to recognize a particular type of matter and
to distinguish from other types.
atoms - Answers the infinitesimal (submicroscopic) building blocks of matter
molecules - Answers two or more atoms joined in specific shape
states of matter - Answers gas, liquid, solid
gas - Answers has no fixed volume or shape; uniformly fills a container.
liquid - Answers distinct volume indépendant of its container; assumes the shape of the portion
of the container it occupies.
solid - Answers definite shape and definite volume
what is a pure substance? - Answers matter that has distinct properties and a composition that
does not vary from sample to sample. All substances are either elements of compounds.
What is an element? - Answers (on the molecular level) only composed of one kind of atom and
cannot be decomposed into similar substances.
what is a compound? - Answers substances composed of two or more elements (contain two or
more different kinds of atoms).
What is a mixture? - Answers a combination of two or more in which each retains its chemical
identity.
What 5 elements account for over 90% of the earth's crust? - Answers oxygen, silicon, aluminum,
iron, and calcium.
Law of definite proportions - Answers the elemental composition of a pure compound is always
the same, regardless of it's source.
What is a homogenous mixture? - Answers a mixture of substances that has a uniform
composition.
what is a heterogenous mixture? - Answers mixtures that are not uniform throughout.
what are the 2 different properties of matter? - Answers chemical and physical.
, physical change - Answers changes that occur with no change in chemical composition.
chemical change (chemical reaction) - Answers processes in which one or more substances are
converted into other substances.
changes of state - Answers changes of matter from one state to a different one; exp. gas to a
liquid. All changes of state are physical changes.
what system is used for scientific measurement? - Answers metric
what is a hypothesis? - Answers a tentative explanation of a series of observations or of natural
law.
in science, what is a theory? - Answers a tested model or explanation that satisfactorily
accounts for a certain set of phenomena.
what is scientific law? - Answers a concise verbal statement or a mathematical equations hat
summarizes a wide range of observations and experiences.
what is the difference between a theory and scientific law? - Answers scientific law is a
statement of what always happens whereas a theory is an explanation for what happens.
What are SI units? - Answers The preferred metric units for use in science. It has 7 base units
from which all other units are derived.
what is the SI base unit length? - Answers the meter (m)
what is the SI base unit of mass? - Answers the kilogram (kg)
what is the SI base unit of temperature? - Answers kelvin (K)
what is the SI base unit of time? - Answers seconds (s or sec)
what is the SI base unit of amount of substance? - Answers Mole (mol or M)
what is the absolute temperature scale? - Answers Kelvin. Zero (aka absolute zero) on the
Kelvin scale corresponds to -273.15 degrees Celsius. The freezing point of water is 273.15 K, or
0 degrees Celsius, or 32 degrees Fahrenheit.
what is an exact number? - Answers those whose values are known exactly; exp. the number of
people in a classroom, how many eggs in a dozen eggs, anything that can be counted exactly.
What is an inexact number? - Answers anything obtained by measurement.
what is precision? - Answers the closeness of agreement among several measurements of the
same quantity; the reproducibility of a measurement.
what is accuracy? - Answers a measure of how closely individual measurements agree with the
