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Chem 105 > Lecture 2: The Science of Matter > Flashcards

Lecture 2: The Science of Matter Flashcards

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1
Q

All matter is either (2)

A

-pure substances
-mixtures

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2
Q

pure substances are either (2)

A

-element (identical atoms)
-compound (2+ elements, combined chemically)

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3
Q

mixture are either (2)

A

-homogenous (evenly distributed)
-heterogenous (unevenly distributed)

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4
Q

atoms with charges

A

monatomic ions

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5
Q

molecules with charges

A

polyatomic ions

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6
Q

defined vol & shape? solids?

A

yes and yes

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7
Q

defined vol & shape? liquids?

A

vol yes, shape no

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8
Q

defined vol & shape? gases?

A

no and no

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9
Q

Chemisty is

A

the study of the COMPOSITION, STRUCTURE, and PROPERTIES of matter and its CHANGES

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10
Q

energy is

A

the capacity to do work

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11
Q

work is

A

the exertion of a force through a distance

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12
Q

gas -> solid

A

deposition

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13
Q

gas-> liquid

A

condensation

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14
Q

liquid-> solid

A

freezing

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15
Q

solid-> liquid

A

melting

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16
Q

liquid-> gas

A

vaporization

17
Q

solid-> gas

A

sublimination

18
Q

a molecule is

A

2+ atoms bonded together

19
Q

chemical properties are

A

how atoms react to other atoms

20
Q

physical properties are

A

observed or measured without changing

21
Q

intensive properties are

A

not dependent on how much of the substance is present

22
Q

extensive properties are

A

dependent on how much of a substance is present

23
Q

matter is

A

anything that occupies space

24
Q

how many elements on the periodic table

A

188

25
Q

composition of matter is the

A

specific combination of atoms

26
Q

structure of matter is

A

how atoms are arranged spatially

27
Q

a chemical reaction is

A

a process that changes the chemical identity of composition and structure of the materials

28
Q

law of conservation of energy

A

matter cannot be created or destroyed, only converted

29
Q

law of definite proportions

A

a compound has fixed proportions (H20 is always 89% O)

30
Q

law of multiple proportions

A

the ratio of compounds always involves small whole numbers

Chem 105 (36 decks)

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