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CUMULATIVE EXAM CHEMISTRY

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CUMULATIVE EXAM CHEMISTRY

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  • September 17, 2024
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  • 2024/2025
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CUMULATIVE EXAM CHEMISTRY FINAL EXAM NEWEST
ACTUAL EXAM COMPLETE 200 QUESTIONS AND
CORRECT DETAILED ANSWERS (VERIFIED ANSWERS) |
ALREADY GRADED A+
What is chemistry - ANSWER: the study of matter and the changes it undergoes

What are elements classified as? - ANSWER: metals, nonmetals, metalloids

Can elements be broken down? - ANSWER: No

What are the diatomic molecules? - ANSWER: H2, N2, O2, F2, Cl2, Br2, I2

What are mixtures - ANSWER: Substances containing two or more different elements
that are not chemically bonded together

What type of mixtures are there? - ANSWER: heterogeneous and homogeneous

What is a colloid? - ANSWER: A mixture containing small, undissolved particles that
do not settle out.

What is a suspension? - ANSWER: A mixture in which particles can be seen and easily
separated by settling or filtration

What is matter? - ANSWER: anything that has mass and volume

What are the 2 properties of matter? - ANSWER: extensive and intensive

What does extensive mean? - ANSWER: depends on the amount of matter

What does intensive mean? - ANSWER: Depends on type in sample

What are all of the phase transitions? - ANSWER: Melting, freezing, evaporation,
condensing, sublimation, and deposition.

What is melting point? - ANSWER: the temperature at which a substance changes
from a solid to a liquid

What is freezing point - ANSWER: the temperature at which a liquid becomes a solid

What is evaporation - ANSWER: When a liquid turns into a gas

What is condensing - ANSWER: The change of state from a gas to a liquid

, What is sublimation? - ANSWER: the process in which a solid changes directly into a
gas

What is deposition? - ANSWER: gas to solid

What is a Chemical change? - ANSWER: a change that produces matter with a
different composition than the original matter

What is a physical change? - ANSWER: A change in which the form or appearance
changes, but no new substances are formed

Is iron rusting a physical or chemical change? - ANSWER: chemical change

Is wood burning a chemical or physical change? - ANSWER: chemical change

Is freezing a physical or chemical change? - ANSWER: physical change

Is cutting paper a physical or chemical change? - ANSWER: physical change

What is a separation technique? - ANSWER: A process that converts a mixture of
solution of a chemical substance into two or more distinct product mixtures.

What are all examples of separation techniques? - ANSWER: Distillation,
evaporation, filtration, and chromatography.

What is distillation? - ANSWER: the action of purifying a liquid by a process of
heating and cooling.

What is evaporation? - ANSWER: When a liquid turns into a gas

What is filtration? - ANSWER: the process that separates a solid from the liquid in a
heterogeneous mixture

What is chromatography? - ANSWER: process by which it can separate complex
mixtures into their component parts

What are Daulton's theories - ANSWER: 1. All elements are composed of indivisible
particles called atoms. 2. Atoms of the same element are identical. The atoms of any
one element are different from those of another. 3. Atoms of different elements mix
or combine in whole number ratios. 4. Chemical reactions occur when atoms
separate, join, or rearrange. In a chemical reaction, atoms of one element never
change into one another.

Who was Democritus and what did he do? - ANSWER: Greek philosopher who was
among the first to suggest the existence of atoms

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