CHEM 120 Final Exam 1 GRADED A+ (ACTUAL EXAM )
Questions and Answers (Solved)
- define matter
Answer: anything that has mass and takes up space
- what is not considered matter?
Answer: light, heat, electricity
- definite shape, definite volume
Answer: solid
- indefinite shape, definite volume
Answer: liquid
- indefinite shape, indefinite volume
Answer: gas
- pure substance
Answer: one substance; definite and constant composition; can't be separated
into 2 kinds of matter by physical means; single kind of matter
- heterogeneous mixture
Answer: nonuniform in appearance; visibly different phases
- homogeneous mixture
Answer: visibly one distinct phase; uniform properties
- examples of pure substances
Answer: water, sugar, table salt 1 / 2
- examples of heterogeneous mixtures
Answer: trail mix, chocolate chip cookies, cereal and mix
- examples of homogeneous mixtures
Answer: chocolate milk, orange juice, salt water
- element v compound
Answer: can't be broken down into simpler substances by chemical or physical
means -v- can be broken down into elements by chemical, but not physical means
- mixture v compound
Answer: physical combinations of substances -v- chemical com- bination of
substances
- most abundant elements in the universe as a whole plus in earth's crust-
Answer: hydrogen and oxygen
- two most abundant elements in the earth's crust
Answer: oxygen and silicon
- Ag
Answer: silver
- Al
Answer: aluminum
- Ar
Answer: argon
- Au
Answer: gold
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