CHEM 120 Final Exam 1 GRADED A ACTUAL EXAM

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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