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Chem 1301 > Quiz 1 > Flashcards

Quiz 1 Flashcards

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0
Q

Compound

A

Pure substance
Has 2 or more elements w/ same proportions
Elements are chemically bound
Ex. CO2

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1
Q

Element

A

A pure substance

Cant be broken down

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2
Q

Pure substance

A

Substance w/ uniform composition

Either made of 1 type atom or 1 type molecule

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3
Q

Mixture

A

Substance w/ two or more types of atoms/molecules w/ varying proportions

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4
Q

Homogeneous

A

Uniform mixture
Single phase
Ex. Salt water

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5
Q

Heterogeneous

A

Mixture that is not uniform
Multiple phase
Ex. Stew

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6
Q

Physical property/change

A

Change/quality that can be observed w/o changing the chemical makeup/atoms of the substance
Can generally be reversed
Ex. Change of state

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7
Q

Chemical property/change

A

Quality that changed chemical/atomic makeup of matter
Creates a new substance
Can’t be reversed
Evidence: change of color, odor, rust, etc

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8
Q

Intensive property

A

Independent of number/amount

Doesn’t change when matter is added or subtracted

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9
Q

Extensive property

A

Dependent of number/amount

Changes when matter is added or subtracted

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10
Q

Quantitative

A

Measures something about a process
Numbers
Has units

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11
Q

Qualitative

A

Describes characteristics
Describes how a process happens
Not a number

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12
Q

Pure Substance or Mixture? Then classify

Carbon Dioxide

A

Pure substance

Compound

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13
Q

Pure Substance or Mixture? Then classify

Iron

A

Pure substance

Element

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14
Q

Pure Substance or Mixture? Then classify

Aluminum

A

Pure Substance

Element

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15
Q

Pure Substance or Mixture? Then classify

Beef stew

A

Mixture

Hetero

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16
Q

Intensive or Extensive?

Density

A

I

17
Q

Intensive or Extensive?

Boiling temperature

A

I

18
Q

Intensive or Extensive?

Freezing temperature

A

I

19
Q

Intensive or Extensive?

Conductivity

A

I

20
Q

Intensive or Extensive?

Ductility

A

I

21
Q

Intensive or Extensive?

Malleability

A

I

22
Q

Intensive or Extensive?

Luster

A

I

23
Q

Intensive or Extensive?

Temperature

A

I

*intensive form of energy

24
Q

Intensive or Extensive?

Mass

A

E

25
Q

Intensive or Extensive?

Weight

A

E

26
Q

Intensive or Extensive?

Volume

A

E

27
Q

Intensive or Extensive?

Length

A

E

28
Q

Intensive or Extensive?

Potential Energy

A

E

Because depends on mass

29
Q

Intensive or Extensive?

Kinetic Energy

A

E

30
Q

Phys or Chem change?

Sugar burning

A

Chemical

31
Q

Phys or Chem change?

Sugar dissolving in water

A

Phys

32
Q

Phys or Chem change?

Platinum ring becoming dull because abrasion

A

Phys

33
Q

Phys or Chem change?

Silver tarnishes

A

Chem

34
Q

Two requirements to be a property of matter

A
  1. Applicable to all matter
  2. Not dependent on history of the matter
m
T
d
E
F
P

*work is NOT a property of matter because it depends on path taken

35
Q

Is energy a property of matter?

A

Yes

36
Q

Is air homogenous or heterogeneous?

A

homogenous

37
Q

Which Law/theory states that no matter how or where a given compound is prepared or where it’s found, it will always have the same composition?

A

Law of constant composition

38
Q

Which Law/theory states that compounds must be made up of whole numbers of particles?

A

Dalton’s theory of multiple proportions

39
Q

5 components of Dalton’s Theory

A
  1. All elements are made up of minute indivisible particles called atoms
  2. Atoms can neither be created nor destroyed
  3. All atoms of a given element have identical mass and other properties
  4. Atoms of different elements have different properties
  5. A particle of a compound is made up of a fixed whole number of atoms of its component elements. Ex AB, AB2, A2B
40
Q

Basic ideas of Law of Combining Volumes

A
  1. G-L: equal volumes contain an equal number of gas particles
  2. D: gaseous elements should be atoms (don’t like each other)
  3. D: molecules must contain whole atoms (identify violations)
  4. Avogadro (peacekeeper): if necessary, elements can be diatomic molecules. Remove violations by making elements that have fractions into diatomic molecules
41
Q

An element must be

A

An atom or diatomic molecule

Chem 1301 (3 decks)

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