Chem 134 Midterm 1 Exam Questions
& Answers (Grade A+)
Mass -
correct answer ✅the amount of matter in an object
matter -
correct answer ✅Anything that has mass and takes up space
Pure substance -
correct answer ✅matter with constant composition and cannot be
broken down into simpler matter by physical processes
Physical Processes -
correct answer ✅Transformation of a sample of matter such as a
change in physical state but doesnt after chemical identity
What is an element? -
correct answer ✅a pure substance at its simplest state
What is a compond? -
correct answer ✅pure substances combined of 2 or more
elements in fixed proportions and broken down by chemical rxns.
,Chem 134 Midterm 1 Exam Questions
& Answers (Grade A+)
What is a mixture? -
correct answer ✅a combination of pure substances in variable
proportions in which individual substances retain chemical
identities and can be separated from one another in phyiscal
processes
What is an atom? -
correct answer ✅An atom is the smallest particle of an element
that retains the elements properties
What is a molecule? -
correct answer ✅a collection of chemically bonded atoms:
chemical bond holds them together
What is the law of constant compostion? -
correct answer ✅all samples of a compound contain the same
elements combined in same proportions
ex) always 2 molecules of H for 1 of O
, Chem 134 Midterm 1 Exam Questions
& Answers (Grade A+)
What is an ion? -
correct answer ✅A particle consisting of one or more atoms that
has a net positive or negative electrical charge ( caton or anion)
What are intensive properties and examples? -
correct answer ✅Properties that are independent of the amount
of substance present: color, hardness, malleability
Extensive properties -
correct answer ✅Properties that vary with quanitity of substance
present ex) length,width, mass
Physical properties -
correct answer ✅A property of a substance that can be observed
without changing it into another substance
ex) density
Chemical properties -
correct answer ✅A property of a substance that can only be
observed by reacting it to from another substance ex) flammability
y
& Answers (Grade A+)
Mass -
correct answer ✅the amount of matter in an object
matter -
correct answer ✅Anything that has mass and takes up space
Pure substance -
correct answer ✅matter with constant composition and cannot be
broken down into simpler matter by physical processes
Physical Processes -
correct answer ✅Transformation of a sample of matter such as a
change in physical state but doesnt after chemical identity
What is an element? -
correct answer ✅a pure substance at its simplest state
What is a compond? -
correct answer ✅pure substances combined of 2 or more
elements in fixed proportions and broken down by chemical rxns.
,Chem 134 Midterm 1 Exam Questions
& Answers (Grade A+)
What is a mixture? -
correct answer ✅a combination of pure substances in variable
proportions in which individual substances retain chemical
identities and can be separated from one another in phyiscal
processes
What is an atom? -
correct answer ✅An atom is the smallest particle of an element
that retains the elements properties
What is a molecule? -
correct answer ✅a collection of chemically bonded atoms:
chemical bond holds them together
What is the law of constant compostion? -
correct answer ✅all samples of a compound contain the same
elements combined in same proportions
ex) always 2 molecules of H for 1 of O
, Chem 134 Midterm 1 Exam Questions
& Answers (Grade A+)
What is an ion? -
correct answer ✅A particle consisting of one or more atoms that
has a net positive or negative electrical charge ( caton or anion)
What are intensive properties and examples? -
correct answer ✅Properties that are independent of the amount
of substance present: color, hardness, malleability
Extensive properties -
correct answer ✅Properties that vary with quanitity of substance
present ex) length,width, mass
Physical properties -
correct answer ✅A property of a substance that can be observed
without changing it into another substance
ex) density
Chemical properties -
correct answer ✅A property of a substance that can only be
observed by reacting it to from another substance ex) flammability
y
