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Chemistry > Examen 26/9/17 > Flashcards

Examen 26/9/17 Flashcards

1
Q

Is the science that studies matter and the changes it undergoes

A

Chemistry

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2
Q

What is matter?

A

Anything that takes up space an has mass.

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3
Q

Which are the properties of matter?

A

Inertia, Density, Volume, Physical, Chemical, Instensive and Extensive

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4
Q

What is the resistance of an object to move from its original state

A

inertia

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5
Q

Amaunt of Volume m/v

A

Density

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6
Q

Amount of matter in a specific space:

A

Volume

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7
Q

Characteristics that can be seen and touched

A

Physical

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8
Q

Ability to change to another ‘‘substance’’

A

Chemical

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9
Q

Depends in the amount of matter

A

Instensive

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10
Q

Doesn’t depend on matter amount

A

Extensive

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11
Q

Is this change physical or chemical?

Body digesting food

A

Chemical

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12
Q

Is this change physical or chemical?

Rubbing Alcohol Evaporates

A

Physical

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13
Q

Is this change physical or chemical?

Clay is molded in a new shape.

A

Physical

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14
Q

Is this change physical or chemical?

Milk goes sour.

A

Chemical

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15
Q

Is this change physical or chemical?

Jewerly Tarnishes

A

Chemical

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16
Q

Is this change physical or chemical?

Butter melts

A

Physical

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17
Q

Is this change physical or chemical?

A match is lit

A

Chemical

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18
Q

Is this change physical or chemical?

Frying an egg

A

Chemical

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19
Q

Is this change physical or chemical?

Aluminium foil is cut

A

Physical

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20
Q

Is this change physical or chemical?

Juice in a box freezes

A

Physical

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21
Q

Which are the 3 states of matter?

A

Solid, Liquid, Gas, Plasma & Bose-EinsteinCondensate

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22
Q

Which is the state of matter that assumes the shape of its container’s shape, is not compressible, and flows easily

A

Liquid

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23
Q

Which is the state of matter that has a fixed shape and volume, has little space between particles, and particles can’t move.

A

Solid

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24
Q

Which is the state of matter that assumes its container’s shape, is compressible, and flows easily

A

Gas

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25
Q

Which is the state of matter that is positively charged, is used in neon lights and its ionized.

A

Plasma

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26
Q

How can a liquid become gas?

A

Through evaporation

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27
Q

How can a solid become liquid?

A

Through Melting

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28
Q

How can a gas become solid?

A

Through deposition

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29
Q

How can a gas become liquid?

A

Through condesation

30
Q

How can a liquid become solid?

A

Through freezing

31
Q

How can a solid become gas?

A

Through sublimation

32
Q

Which is the state of matter that has very low temperatures, minimum energized particles and molecules make a ‘‘super atom’’.

A

Bose-Einstein Condensate

33
Q

What is a pure substance?

A

A single kind of matter with a specific composition and properties

34
Q

What is a mixture?

A

The physical combination of 2 or more substances, in which they retain their distinct identities

35
Q

What is an element?

A

a pure substance that can’t be broken down by any physical or chemical means

36
Q

What is a compound?

A

A substance of 2 or more elements chemically combined

37
Q

What is the difference between an Homogeneous solution and a Heterogeneous one?

A

The heterogeneous is made by more than one visibly phase

38
Q

Is this mixture heterogeneous or homogeneous?

Water & Oil

A

Heterogeneous

39
Q

Is this mixture heterogeneous or homogeneous?

Sea water

A

Homogeneous

40
Q

Is this mixture heterogeneous or homogeneous?

Tequila

A

Homogeneous

41
Q

Is this mixture heterogeneous or homogeneous?

Sand & water

A

Heterogenous

42
Q

Is this mixture heterogeneous or homogeneous?

air

A

homogeneous

43
Q

Which are 5 separation methods?

A

Magnetism, Distillation, Chromatography, Decantration, Separation funnel, Evaporation, Filtration and sublimation.

44
Q

How are well-mixed mixtures that contain a solvent an at least 1 solute called?

A

Solution

45
Q

What is a universal solvent?

A

Water

46
Q

Which are the 3 types of solutions?

A

Unsaturated, Saturated and Supersaturated.

47
Q

What is an Unsaturated solution?

A

When you can still dissolve more solute

48
Q

What is a saturated solution?

A

When no more solute can be dissolved

49
Q

What is a Supersaturated solution?

A

When it has more dissolved solute than the one soluble

50
Q

Is the amount of solute dissolved to a solvent.

A

Concentration

51
Q

Is how much solute can be dissolved at a given temperature

A

Solubility

52
Q

What are Colloids?

A

Is a mixture containing small, undissolved particles that do not settle out.

53
Q

What is a suspension?

A

A mixture in which particles can be easily separated my settling a filtration.

54
Q

What are the 7 parts of the scientific method?

A
  • Observations
  • Hypotesis
  • Experiments
  • Analyzing results
  • Conclusions
  • Repeating experiment
  • Theory/ Scientific law
55
Q

What is qualitative data?

A

observable things

56
Q

What is quantitative data?

A

Measurable with numbers

57
Q

It is a testable statement of prediction about what has been observed

A

Hypotesis

58
Q

It is a set of controlled observations that test the hypotesis

A

Experiment

59
Q

What is the difference between the Independent and the dependent variable?

A

The independent is the one you change intentionally and the dependent is the result of that change

60
Q

It is a judgement based on the results:

A

Conclusion

61
Q

It is the Explanation of a natural phenomenon based on many observations and investigations over time.

A

Theory

62
Q

It is the Relationship in the nature supported by many experiments

A

Scientific law

63
Q

What is the difference between the Applied and pure knowledge?

A

The pure knowledge purpose is to gain knowledge just for the sake of it, and the applied is for solving a scientific problem

64
Q

What is energy?

A

The ability to do work or produce heat

65
Q

What does the law of conservation of energy say?

A

That in any chemical reaction or physical process, energy can be converted from one form to other, but it is neither created nor destroyed

66
Q

What is a Calorie?

A

The amount of energy required to heat a gram of pure water by 1ºC

67
Q

What is heat?

A

Energy in process of moving from an object to another

68
Q

How much calories equal 1 J?

A

1J=.239cal

69
Q

What is specific heat?

A

Amount of heat required to raise the temperature of one gram of ANY SUBSTANCE by 1ºC

70
Q

Which are the types of energy?

A

Chemical, Mechanical, Nuclear, Radiant, electrical, Heat

71
Q

Which are, in order, all the proposed atomic models?

A

Dalton, Thomson, Rutherford, Chadwick, Bohr, Sommefield And Schrödinger Gutenberg.

Chemistry (4 decks)

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