CHEM 104 Final Exam | Questions & Answers (100 %Score) Latest Updated 2024/2025
Comprehensive Questions A+ Graded Answers | With Expert Solutions
(Chapter 2) What is the Formula for Density? - Density= mass of a substance/volume of a substance
(Chapter 2) What is the Specific Gravity Formula? - SG= density of sample/density of water
(Chapter 3) Pure Substances - A pure substance is classified as:
- a type of matter with a fixed or definite composition
- an element that is composed of one type of atom
- a compound that is composed of two or more elements always combined in the same proportion
(Chapter 3) Mixtures - A mixture is a type of matter that consists of:
- two or more substances that are physically mixed but not chemically combined
- two or more substances in different proportions
- substances that can be separated by physical methods
(Chapter 3) Differences between Homogeneous and Heterogeneous Mixtures? - Homogeneous:
The composition is uniform throughout
- the different parts of the mixture are not visible
Heterogeneous:
- the composition varies from one part of the mixture to another
- the different parts of the mixture are visible
(Chapter 3) Chemistry Link to Health: Scuba Breathing Mixtures - Breathing mixtures for scuba are
homogeneous mixtures
Some examples are:
- Nitrox (oxygen and nitrogen gases)
- Heliox (oxygen and helium gases)
, - Trimix (oxygen, helium, and nitrogen gases)
(Chapter 3) Define Solid and their properties? - Solid:
- a definite shape
- a definite volume
- particles that are close together in a fixed arrangement
- particles that move very slowly
Define Liquid and their properties? - - an indefinite shape but a definite volume
- the same shape as their container
- particles that are close together but mobile
- particles that move slowly
Define Gas and their properties? - - an indefinite shape and indefinite volume
- the same shape and volume as their container
- particles that are far apart/particles that move very fast
Define Physical Change and Physical Properties? - Physical Properties:
- are characteristics observed or measured without changing the identity of a substance
- include shape, physical state, boiling and freezing points, density and color of substance
Physical Change:
- a change in the state
- a change in the physical shape
- no change in the identity and composition of the substance
Define Chemical Change and Chemical Properties? - Chemical Properties:
- describe the ability of a substance
- to interact with other substances
- to change into a new substance
Comprehensive Questions A+ Graded Answers | With Expert Solutions
(Chapter 2) What is the Formula for Density? - Density= mass of a substance/volume of a substance
(Chapter 2) What is the Specific Gravity Formula? - SG= density of sample/density of water
(Chapter 3) Pure Substances - A pure substance is classified as:
- a type of matter with a fixed or definite composition
- an element that is composed of one type of atom
- a compound that is composed of two or more elements always combined in the same proportion
(Chapter 3) Mixtures - A mixture is a type of matter that consists of:
- two or more substances that are physically mixed but not chemically combined
- two or more substances in different proportions
- substances that can be separated by physical methods
(Chapter 3) Differences between Homogeneous and Heterogeneous Mixtures? - Homogeneous:
The composition is uniform throughout
- the different parts of the mixture are not visible
Heterogeneous:
- the composition varies from one part of the mixture to another
- the different parts of the mixture are visible
(Chapter 3) Chemistry Link to Health: Scuba Breathing Mixtures - Breathing mixtures for scuba are
homogeneous mixtures
Some examples are:
- Nitrox (oxygen and nitrogen gases)
- Heliox (oxygen and helium gases)
, - Trimix (oxygen, helium, and nitrogen gases)
(Chapter 3) Define Solid and their properties? - Solid:
- a definite shape
- a definite volume
- particles that are close together in a fixed arrangement
- particles that move very slowly
Define Liquid and their properties? - - an indefinite shape but a definite volume
- the same shape as their container
- particles that are close together but mobile
- particles that move slowly
Define Gas and their properties? - - an indefinite shape and indefinite volume
- the same shape and volume as their container
- particles that are far apart/particles that move very fast
Define Physical Change and Physical Properties? - Physical Properties:
- are characteristics observed or measured without changing the identity of a substance
- include shape, physical state, boiling and freezing points, density and color of substance
Physical Change:
- a change in the state
- a change in the physical shape
- no change in the identity and composition of the substance
Define Chemical Change and Chemical Properties? - Chemical Properties:
- describe the ability of a substance
- to interact with other substances
- to change into a new substance
