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General Chemistry H > Chapter 1 Review > Flashcards

Chapter 1 Review Flashcards

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1
Q

What are some indicators of a chemical reaction?

A

A precipitate forming, color changing, a gas forming (bubbles), temperature change, and noticeable odor.

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2
Q

If you can get the things back, it is a

A

Physical change

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3
Q

If you can’t get the things back and there is a new product, it is a

A

chemical change

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4
Q

What is an angstrom?

A

10^-10 meters

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5
Q

What is the angstrom used to measure?

A

Atoms

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6
Q

What is the metric unit for distance?

A

Meters

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7
Q

What is the metric unit for volume?

A

Liters

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8
Q

What is the metric unit for temperature?

A

Kelvin

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9
Q

What is the metric unit for time?

A

Seconds

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10
Q

What is the metric unit for mass?

A

Grams

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11
Q

What is the metric unit for energy?

A

Joules

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12
Q

What is the metric unit for the amount of stuff?

A

Moles

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13
Q

What is the conversion from °C to K?

A

K = °C +273.15

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14
Q

What is absolute zero in °C?

A

-273.15

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15
Q

What is a decimeter?

A

1/10 of a meter

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16
Q

What is a centimeter?

A

1/100 of a meter

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17
Q

What is a millimeter?

A

1/1000 of a meter

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18
Q

What is a micrometer?

A

1/1000000 of a meter or 1.0*10^-6 m

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19
Q

What is a nanometer?

A

1/1000000000 of a meter or 1.0*10^-9 m

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20
Q

What is a picometer?

A

1/1000000000000 of a meter or 1.0*10^-12 m

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21
Q

What is a decameter?

A

10 meters

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22
Q

What is a kilometer?

A

1000 meters

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23
Q

What is a histogram?

A

Graphing of numbers according to how often they appear

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24
Q

How is a histogram made?

A

Data is binned into convenient ranges

25
Q

What does changing the bin size do?

A

It changes the appearance of the graph and the conclusions drawn from the graph

26
Q

What do histograms allow us to analyze?

A

Extremely large data sets by reducing them to one graph.

27
Q

What does a histogram show?

A

The primary, secondary, and tetriary peaks in data and give a visual representation of the significance of those peaks.

28
Q

What is the 5% rule?

A

If the 0<=x<=5 then the data is reliable

29
Q

What is the 5% rule equation?

A

x=(y-intercept/largest y-value)*100

30
Q

What do sig-figs not apply to?

A

counted numbers

31
Q

How should estimation be done regarding sig-figs?

A

Take what the instrument gives you and estimate the last value

32
Q

All non-zero digits are

A

significant

33
Q

all zeros between non-zero digits are

A

significant

34
Q

zeros to the right of a non-zero digit and a decimal point are

A

significant

35
Q

zeros to the right of a non-zero digit but not a decimal point are

A

not significant

36
Q

zeros to the right of a decimal point but not to the right of a non-zero digit are

A

not necessarily significant

37
Q

zeros between a non-zero digit and a decimal point are

A

significant

38
Q

zeros before non-zero digits are

A

not significant

39
Q

How many sig-figs are there in 27591.452?

A

8

40
Q

How many sig-figs are there in 50?

A

3

41
Q

how many sig-figs are there in 250?

A

2

42
Q

How many sig-figs are there in 25.0?

A

3

43
Q

How many sig-figs are there in 250.?

A

3

44
Q

How many sig figs are there in 0.0025?

A

2

45
Q

How many sig figs are there in 02340.4050

A

8

46
Q

What is the percent error equation?

A

((|experimental value - theoretical value)/theoretical value)*100

47
Q

What is a good percent error?

A

<10%

48
Q

What is a pretty good percent error?

A

<20%

49
Q

What is a decent percent error?

A

<30%

50
Q

When adding or subtracting, the answer should have what?

A

The same number of decimal places as the measurement with the least decimal places

51
Q

When adding or subtracting, do you count sig-figs?

A

NO

52
Q

When multiplying or dividing, do you count sig-figs?

A

YES

53
Q

When multiplying or dividing, the answer should have what?

A

Sig-figs as the measurement with the least amount of sig-figs

54
Q

How do you know which digit is uncertain?

A

The digit that was estimated

55
Q

Uncertainty is always..

A

+- 1 (i.e. +-0.1, +-1, +-10, etc.)

56
Q

What is density?

A

how much matter is in a given space

57
Q

What is dimensional analysis based off of?

A

The cancelling of units and the use of conversion factors

58
Q

What is a conversion factor?

A

Any # with 2 units of measure

59
Q

Can a conversion factor be flipped?

A

yes

General Chemistry H (4 decks)

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