CHEM 103 Exam (Questions With 100%
Correct Answers) |Graded A+
1. Define Chemistry
- ANSWER: the study of the composition, properties, and interactions of
matter.
2. Define Matter
- ANSWER: Anything that has mass and occupies space
3. Define Scientific method
- ANSWER: path of discovery that leads from question and observation to law
or hypothesis to theory, combined with experimental verification of
the hypothesis and any necessary modification of the theory
4. physical change
- ANSWER: does not affect the chemical makeup of a substance
5. chemical change
- ANSWER: change in chemical makeup of a substance
6. define matter:
- ANSWER: is defined as anything that occupies space and has mass, and it is
all around us.
7. Identify the three common states of matter
- ANSWER: solid , liquid, and gasses
8. describe waters state of matter
- ANSWER: A liquid flows and takes the shape of a container, except that it
forms a flat or slightly curved upper surface when acted upon by
gravity. (In zero gravity, liquids assume a spherical shape.)
9. describe solid state of matter
- ANSWER: is rigid and possesses a definite shape.
10. describe gasses state of matter
- ANSWER: A gas takes both the shape and volume of its container.
11. Classify matter as an element
- ANSWER: Pure substances that cannot be broken down into simpler
substances by chemical changes are called elements.
12. Classify matter as an compound
, CHEM 103 Exam (Questions With 100%
Correct Answers) |Graded A+
- ANSWER: Pure substances that can be broken down by chemical changes
are called compounds.
13. Classify matter as an homogenous mixture
- ANSWER: A homogeneous mixture, also called a solution, exhibits a uniform
composition and appears visually the same throughout.
(Gatorade)
14. Classify matter as an heterogenous mixture
- ANSWER: A mixture with a composition that varies from point to point is
called a heterogeneous mixture. for example: Oil and vinegar
salad dressing is a heterogeneous mixture because its
composition is not uniform throughout.
15. Classify matter as a mixture
- ANSWER: A mixture is composed of two or more types of matter that can be
present in varying amounts and can be separated by physical
changes, such as evaporation (you will learn more about this
later).
16. the law of conservation of matter is and how it relates to the classifications of
matter
- ANSWER: The law of conservation of matter summarizes many scientific
observations about matter: It states that there is no detectable
change in the total quantity of matter present when matter
converts from one type to another (a chemical change) or
changes among solid, liquid, or gaseous states (a physical
change).
17. Classify whether N2 is a element, compound, pure substance, homogenous
mixture, heterogeneous mixture, or a solution
- ANSWER: Element and a pure substance
18. Classify whether O2 is a element, compound, pure substance, homogenous
mixture, heterogeneous mixture, or a solution
- ANSWER: element and pure substance
19. Classify whether N2O is a element, compound, pure substance, homogenous
mixture, heterogeneous mixture, or a solution
- ANSWER: compound and pure substance
Correct Answers) |Graded A+
1. Define Chemistry
- ANSWER: the study of the composition, properties, and interactions of
matter.
2. Define Matter
- ANSWER: Anything that has mass and occupies space
3. Define Scientific method
- ANSWER: path of discovery that leads from question and observation to law
or hypothesis to theory, combined with experimental verification of
the hypothesis and any necessary modification of the theory
4. physical change
- ANSWER: does not affect the chemical makeup of a substance
5. chemical change
- ANSWER: change in chemical makeup of a substance
6. define matter:
- ANSWER: is defined as anything that occupies space and has mass, and it is
all around us.
7. Identify the three common states of matter
- ANSWER: solid , liquid, and gasses
8. describe waters state of matter
- ANSWER: A liquid flows and takes the shape of a container, except that it
forms a flat or slightly curved upper surface when acted upon by
gravity. (In zero gravity, liquids assume a spherical shape.)
9. describe solid state of matter
- ANSWER: is rigid and possesses a definite shape.
10. describe gasses state of matter
- ANSWER: A gas takes both the shape and volume of its container.
11. Classify matter as an element
- ANSWER: Pure substances that cannot be broken down into simpler
substances by chemical changes are called elements.
12. Classify matter as an compound
, CHEM 103 Exam (Questions With 100%
Correct Answers) |Graded A+
- ANSWER: Pure substances that can be broken down by chemical changes
are called compounds.
13. Classify matter as an homogenous mixture
- ANSWER: A homogeneous mixture, also called a solution, exhibits a uniform
composition and appears visually the same throughout.
(Gatorade)
14. Classify matter as an heterogenous mixture
- ANSWER: A mixture with a composition that varies from point to point is
called a heterogeneous mixture. for example: Oil and vinegar
salad dressing is a heterogeneous mixture because its
composition is not uniform throughout.
15. Classify matter as a mixture
- ANSWER: A mixture is composed of two or more types of matter that can be
present in varying amounts and can be separated by physical
changes, such as evaporation (you will learn more about this
later).
16. the law of conservation of matter is and how it relates to the classifications of
matter
- ANSWER: The law of conservation of matter summarizes many scientific
observations about matter: It states that there is no detectable
change in the total quantity of matter present when matter
converts from one type to another (a chemical change) or
changes among solid, liquid, or gaseous states (a physical
change).
17. Classify whether N2 is a element, compound, pure substance, homogenous
mixture, heterogeneous mixture, or a solution
- ANSWER: Element and a pure substance
18. Classify whether O2 is a element, compound, pure substance, homogenous
mixture, heterogeneous mixture, or a solution
- ANSWER: element and pure substance
19. Classify whether N2O is a element, compound, pure substance, homogenous
mixture, heterogeneous mixture, or a solution
- ANSWER: compound and pure substance
