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Studying > Chemistry > Flashcards

Chemistry Flashcards

1
Q

Matter has anything that has ____ and takes up ______

A

Mass, space

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2
Q

Chemistry is the study of the ________ of matter and the ________ that matter undergoes

A

Composition, changes

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3
Q

Why is air classified as matter?

A

It has mass and takes up space

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3
Q

Why does a shot put have more mass than a hockey puck?

A

Hockey pucks contain more matter

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4
Q

What is the purpose of an experiment?

A

To prove/disprove your hypothesis

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4
Q

Which variable is placed on the x-axis (I or D)?

A

Independent

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4
Q

What is the variable that’s being observed during an experiment called?

A

The dependent variable

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5
Q

What is a scientific theory and how does it differ from a scientific law?

A

Theory - Explains how matter behaves
Law - Explains why it behaves that way

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6
Q

TOF: A theory can be easily proven

A

False

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7
Q

TOF: Scientific laws explain observations

A

False

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8
Q

A logical approach to the solution of scientific problems

A

Scientific Method

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9
Q

TOF: A well-planned experiment will disprove a hypothesis

A

True

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10
Q

Variable that one changes during an experiment

A

Manipulated Variable

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11
Q

Information obtained through one’s senses

A

Observation

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12
Q

A proposed explanation for an observation

A

Hypothesis

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13
Q

A means to test a hypothesis

A

An experiment

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14
Q

Variable that is observed during an experiment

A

Responding variable

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14
Q

An iron ball falls to the ground when you drop it: _______

A

Observation

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15
Q

Earth is a giant magnet, which attracts iron objects: _______

A

Hypothesis

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16
Q

An iron ball and a piece of wood are dropped from the same height: ________

A

Experiment

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17
Q

The iron ball and wood fall at the same rate

A

Observation

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18
Q

Gravity attracts objects in the universe to every other object

A

Scientific Law

19
Q

What is the most effective position for heating over the Bunsen burner? Why is this true?

A

The tip of the blue flame; It’s the hottest part of the flame

20
Q

How many sig figs are in 2304g

A

4 sig figs

20
Q

How many sig figs are in 2340

A

3

20
Q

How many sig figs are in 0.02340

A

4

21
Q

How many sig figs are in 150000

A

2

21
Q

How many sig figs are in 2.340

A

4

21
Q

How many sig figs are in 2.603

A

4

21
Q

How many sig figs are in 9.760

A

4

22
Q

How many sig figs are in 150010

A

5

22
Q

How many sig figs are in 1.5 x 10nm

A

2

23
Q

How many sig figs are in 2.40 x 10g

A

3

24
Q

How many sig figs are in 0.00340

A

3

25
Q

How many sig figs are in 105600

A

4

26
Q

Round 0.0067987 to 3 sig figs

A

0.00680

26
Q

Round 1844863 to 3 sig figs

A

1840000

27
Q

Round 4 to 3 sig figs

A

4.00

28
Q

Round 6.8578 to 3 sig figs

A

6.86

29
Q

Round 30409 to 3 sig figs

A

30400

30
Q

Round 2503 to 3 sig figs

A

250.10kg

31
Q

Precise meaning

A

Close to the guessed variable, not the actual

32
Q

Accurate meaning

A

Close to the actual variable

33
Q

What’s the error formula?

A

Error = Exp - Accurate

34
Q

What’s the percent error formula?

A

% Error = error/actual x 100

35
Q

What’s the base unit for Length?

A

Meter

36
Q

What’s the base unit for Temperature?

A

Kelvin

37
Q

What’s the base unit for Mass?

A

Kilogram

37
Q

What’s the base unit for Time?

A

Seconds

38
Q

What’s the base unit for Amount of a Substance?

A

Mole

39
Q

What’s a derived unit?

A

A unit that’s a mathematical combination of base units (m/s, g/cm, etc)

40
Q

What’s an intensive property?

A

A property that depends on the composition of matter (Density, boiling point, etc)

41
Q

What’s extensive property?

A

A property that depends on the amount of matter (Mass, volume, etc)

42
Q

What does D=M/V mean?

A

Density = Mass/Volume
Volume = Density x Mass

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