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chemistry Flashcards

1
Q

Matter:

A

Has mass and takes up space

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2
Q

Pure Substance:

A

Anything made of one chemical (H20)

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3
Q

Mixture:

A

Physically combined but not chemically combined (you can separate it like saltwater)

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4
Q

Element:

A

Made of one type of atom (H, He)

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5
Q

Homogeneous mixture:

A

Everything is mixed in well (kool-aid)

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6
Q

Heterogeneous mixture:

A

Everything isn’t fully mixed in (trail mix, cereal)

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7
Q

Compound:

A

Matter made of two or more atoms made together (H20, NaCl)

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8
Q

Is air a pure substance or a mixture?

A

Mixture

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9
Q

Is air homogeneous, heterogeneous, an element, or a compound?

A

Homogeneous

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10
Q

Is Copper (Cu) a pure substance or a mixture?

A

Pure substance

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11
Q

Is Copper (Cu) homogeneous, heterogeneous, an element, or a compound?

A

Heterogeneous

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12
Q

Is Copper Sulfide (CuS) a pure substance or a mixture?

A

Pure Substance

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13
Q

Is Copper Sulfide (CuS) homogeneous, heterogeneous, an element, a compound, or a mixture?

A

A compound

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14
Q

Is Trail Mix a pure substance or a mixture?

A

Mixture

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15
Q

Is Trail Mix homogeneous, heterogeneous, an element, or a compound?

A

Heterogeneous

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16
Q

Is Coffee a pure substance or a mixture?

A

Mixture

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17
Q

Is Coffee homogeneous, heterogeneous, an element, or a compound?

A

Homogeneous

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18
Q

Is Silver (Ag) an element or compound?

A

Element

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19
Q

Is Sprite homogeneous or heterogeneous?

A

Homogeneous

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20
Q

Is a Bacon Burger homogeneous or heterogeneous?

A

Heterogeneous

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21
Q

Is Ammonia (NH3) an element or compound?

A

Compound

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22
Q

Why is it possible to separate a mixture using a physical change, but not chemically?

A

Pure substances are CHEMICALLY bonded, so they cannot be separated physically

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23
Q

How would you separate sand, salt, and water?

A

Us a funnel/filter paper to remove sand from the salt water, then boil the water to get the salt out

24
Q

What’s distillation?

A

Separation by different B,P.s

25
Q

What’s chromatography?

A

Separation by solvents through paper

26
Q

How can a compound such, as water, be broken down into its element?

A

Chemical reactions may be used to SEPARATE them into their elements

27
Q

How are substances different from mixtures?

A

Substances: One chemical
Mixture: Two or more chemicals

28
Q

If a rock is heavy, is that a physical property or a chemical property?

A

Physical

29
Q

If the penny has tarnished, is that a physical property or a chemical property?

A

Chemical

30
Q

If the water’s density is 1.0 g/ml, is that a physical property or a chemical property?

A

Physical

31
Q

If the milk has expired, is that a physical property or a chemical property?

A

Chemical

32
Q

If a boat is sinking, is that a physical property or a chemical property?

A

Physical

33
Q

If water freezes at 0 degrees, is that a physical property or a chemical property?

A

Physical

34
Q

If iron rusts when exposed to moisture, is that a physical property or a chemical property?

A

Chemical

35
Q

If acid burns, is that a physical change or a chemical change?

A

Chemical

36
Q

If you tear paper, is that a physical change or a chemical change?

A

Physical

37
Q

If baking soda & vinegar form bubbles when added together, is that a physical change or a chemical change?

A

Chemical

38
Q

If salt dissolves in water, is that a physical change or a chemical change?

A

Physical

39
Q

If you’re chewing gum,
is that a physical change or a chemical change?

A

Physical

40
Q

If a nail is rusting, is that a physical change or a chemical change?

A

Chemical

41
Q

If you burn a candle, is that a physical change or a chemical change?

A

Chemical

42
Q

A solid has a fixed _____ and _____

A

Volume and shape

43
Q

TOF: Solids vibrate in place

A

True

44
Q

Does a liquid have a fixed volume?

A

Yes

45
Q

TOF: Liquids do not take the shape of a container

A

False

46
Q

What state of matter has a definite shape and volume?

A

A solid

47
Q

What does D=m/v mean?

A

Density equals mass divided by volume

48
Q

What do you times by to get the volume of something?

A

Length x width x height

49
Q

What do you do if you’re trying to find the mass of something?

A

Density x volume

50
Q

What do you do if you’re trying to find the density of something?

A

Mass/Volume

51
Q

What do you do if you’re trying to find the volume of something?

A

Mass/Density

52
Q

What are some examples of common materials that are dense?

A

Rock, Iron, Zinc, Copper, etc

53
Q

What are some examples of common materials that are not dense?

A

Air, Styrofoam, etc

54
Q

Describe volume displacement

A

Add an object to water to see volume change, measure L x W x H

55
Q

How can density be used to determine the identity of a material?

A

All objects have the same density at room temp

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