CHEM 120 EXAM 1 WKU EXAM WITH
CORRECT QUESTIONS AND ANSWERS
2025
What are the two rows at the bottom of the periodic table called? - CORRECT-
ANSWERSIanthanides and actinides
Group names? (1, 2, 17, and 18) - CORRECT-ANSWERS1) Alkali metals (+1 charge)
2) Alkaline earth metals (+2 charge)
17) Halogens (-1 charge)
18) Noble gases (-2 charge)
Anything that has mass/can be perceived and takes up space - CORRECT-
ANSWERSMatter
A measure of the amount of matter in an object - CORRECT-ANSWERSMass
Phase change: solid to liquid - CORRECT-ANSWERSFreezing <——> melting
Phase change: liquid to gas - CORRECT-ANSWERSBoiling <——> condensation
Phase change: solid to gas - CORRECT-ANSWERSSublimation <——> condensation
Change of state/condition but not substance itself - CORRECT-ANSWERSPhysical
change
A change in matter that produces one or more new substances - CORRECT-
ANSWERSChemical change
A characteristic of a pure substance that can be observed without changing it into another
substance (boiling/melting point, color, density, hardness, and electrical conductivity) -
CORRECT-ANSWERSPhysical property
, The change of one type of matter into another type (flammability, toxicity, acidity) -
CORRECT-ANSWERSChemical property
Can mixtures be physically separated? - CORRECT-ANSWERSYes because they are not
chemically combined (sweet tea is mixture of sugar and tea)
What is the boiling point of water in degrees Fahrenheit? - CORRECT-ANSWERS212°F
What is the freezing point of water in degrees Fahrenheit? - CORRECT-ANSWERS32°F
What is the boiling point of water in degrees Celsius? - CORRECT-ANSWERS100°C
What is the freezing point of water in degrees Celsius? - CORRECT-ANSWERS0°C
What is the boiling point of water in kelvins? - CORRECT-ANSWERS373 K
What is the freezing point of water in kelvins? - CORRECT-ANSWERS273 K
(°F - 32) x 5/9 + 273 - CORRECT-ANSWERSFahrenheit to kelvin formula
5/9 x (°F - 32) - CORRECT-ANSWERSFahrenheit to Celsius formula
°C x 9/5 + 32 - CORRECT-ANSWERSCelsius to Fahrenheit formula
K - 273 - CORRECT-ANSWERSKelvins to Celsius formula
°C + 273 - CORRECT-ANSWERSCelsius to kelvins formula
(K - 273) x 9/5 + 32 - CORRECT-ANSWERSKelvins to Fahrenheit formula
Mass divided by volume - CORRECT-ANSWERSDensity formula
Density x volume - CORRECT-ANSWERSMass formula
Mass divided by density - CORRECT-ANSWERSVolume formula
True or false. Density is a physical property - CORRECT-ANSWERSTrue
Floats - CORRECT-ANSWERSD < 1 g/ml
Sinks - CORRECT-ANSWERSD > 1 g/ml
CORRECT QUESTIONS AND ANSWERS
2025
What are the two rows at the bottom of the periodic table called? - CORRECT-
ANSWERSIanthanides and actinides
Group names? (1, 2, 17, and 18) - CORRECT-ANSWERS1) Alkali metals (+1 charge)
2) Alkaline earth metals (+2 charge)
17) Halogens (-1 charge)
18) Noble gases (-2 charge)
Anything that has mass/can be perceived and takes up space - CORRECT-
ANSWERSMatter
A measure of the amount of matter in an object - CORRECT-ANSWERSMass
Phase change: solid to liquid - CORRECT-ANSWERSFreezing <——> melting
Phase change: liquid to gas - CORRECT-ANSWERSBoiling <——> condensation
Phase change: solid to gas - CORRECT-ANSWERSSublimation <——> condensation
Change of state/condition but not substance itself - CORRECT-ANSWERSPhysical
change
A change in matter that produces one or more new substances - CORRECT-
ANSWERSChemical change
A characteristic of a pure substance that can be observed without changing it into another
substance (boiling/melting point, color, density, hardness, and electrical conductivity) -
CORRECT-ANSWERSPhysical property
, The change of one type of matter into another type (flammability, toxicity, acidity) -
CORRECT-ANSWERSChemical property
Can mixtures be physically separated? - CORRECT-ANSWERSYes because they are not
chemically combined (sweet tea is mixture of sugar and tea)
What is the boiling point of water in degrees Fahrenheit? - CORRECT-ANSWERS212°F
What is the freezing point of water in degrees Fahrenheit? - CORRECT-ANSWERS32°F
What is the boiling point of water in degrees Celsius? - CORRECT-ANSWERS100°C
What is the freezing point of water in degrees Celsius? - CORRECT-ANSWERS0°C
What is the boiling point of water in kelvins? - CORRECT-ANSWERS373 K
What is the freezing point of water in kelvins? - CORRECT-ANSWERS273 K
(°F - 32) x 5/9 + 273 - CORRECT-ANSWERSFahrenheit to kelvin formula
5/9 x (°F - 32) - CORRECT-ANSWERSFahrenheit to Celsius formula
°C x 9/5 + 32 - CORRECT-ANSWERSCelsius to Fahrenheit formula
K - 273 - CORRECT-ANSWERSKelvins to Celsius formula
°C + 273 - CORRECT-ANSWERSCelsius to kelvins formula
(K - 273) x 9/5 + 32 - CORRECT-ANSWERSKelvins to Fahrenheit formula
Mass divided by volume - CORRECT-ANSWERSDensity formula
Density x volume - CORRECT-ANSWERSMass formula
Mass divided by density - CORRECT-ANSWERSVolume formula
True or false. Density is a physical property - CORRECT-ANSWERSTrue
Floats - CORRECT-ANSWERSD < 1 g/ml
Sinks - CORRECT-ANSWERSD > 1 g/ml
