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AP Chemistry > Significant Figures > Flashcards

Significant Figures Flashcards

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1
Q

Significant Figures in a number consist of…

A

The known digits (figures) of a number plus one estimated digit (figure).

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2
Q

Is the 0 in 9.04 significant?

A

Yes

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3
Q

Is the 0 in 0.46 cm significant?

A

No

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4
Q

Is the 0 in 11.30 cm significant?

A

Yes

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5
Q

Are the 0s in 1600 ft significant?

A

No

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6
Q

How many significant figures does the following number have?

1.60 x 10^3 ft

A

3

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7
Q

How many significant figures does the following number have?

0.0420 cm

A

3

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8
Q

How many significant figures does the following number have?

5.320 in

A

4

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9
Q

How many significant figures does the following number have?

10 lb

A

1

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10
Q

How many significant figures does the following number have?

0.020 ml

A

2

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11
Q

How many significant figures does the following number have?

2403 ft

A

4

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12
Q

How many significant figures does the following number have?

80.5300 m

A

6

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13
Q

How many significant figures does the following number have?

200. g

A

3

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14
Q

How many significant figures does the following number have?

2.4 x 10^3 kg

A

2

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15
Q

Round 10.324578532743 to the nearest 10th.

A

10.3

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16
Q

Round 107.46 to the nearest 10th.

A

107.5

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17
Q

Round 33.51 to the nearest whole number.

A

34

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18
Q

Round 31.509 to the nearest whole number.

A

32

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19
Q

Round 32.509 to the nearest whole number.

A

32

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20
Q

Round the following to 3 significant figures:

3.478 m

A

3.48

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21
Q

Round the following to 3 significant figures:

4.8055 cm

A

4.81 cm

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22
Q

Round the following to 3 significant figures:

5.333 g

A

5.33 g

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23
Q

Round the following to 3 significant figures:

7.999 in

A

8.00 in

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24
Q

How many significant figures would the product of 0.031 and 1365?

A

2

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25
Q

What is the product of 2.1 cm and 3.24 cm to the correct number of significant figures?

A

6.8 cm^2

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26
Q

What is the product of 10.2 cm, 8.24 cm, and 1.8 cm to the correct number of significant figures?

A

150 cm^3

27
Q

How many significant figures would the quotient of 528 and 0.14 contain?

A

2

28
Q

Calculate 20.45/2.4 to the correct number of significant figures?

A

8.5

29
Q

Add 42.56 g + 39.460 g + 4.1 g to the correct significant figures.

A

86.1 g

30
Q

Calculate the sum of 211,420 and 11.456432 to the correct number of significant figures.

A

211,430

31
Q

What is the average of 12.523 g, 12.497 g, and 12.515 g to the correct number of significant figures?

A

12.512 g

32
Q

Give the number of significant figures in the following number:
402 m

A

3

33
Q

Give the number of significant figures in the following number:
0.00420 g

A

3

34
Q

Give the number of significant figures in the following number:
5.1 x 10^4 kg

A

2

35
Q

Give the number of significant figures in the following number:
78,323.01 g

A

7

36
Q

Give the number of significant figures in the following number:
34.20 lbs

A

4

37
Q

Give the number of significant figures in the following number:
3200 liters

A

2

38
Q

Give the number of significant figures in the following number:
0.48 m

A

2

39
Q

Give the number of significant figures in the following number:
1.10 torr

A

3

40
Q

Give the number of significant figures in the following number:
0.03 sec

A

1

41
Q

Give the number of significant figures in the following number:
0.0300 ft

A

3

42
Q

Give the number of significant figures in the following number:
1400.0 m

A

5

43
Q

Give the number of significant figures in the following number:
760 mm Hg

A

2

44
Q

Multiply the following, observing significant figure rules:

17 m x 324 m

A

5500 m^2

45
Q

Multiply the following, observing significant figure rules:

0.005 in x 8888 in

A

40 in^2

46
Q

Multiply the following, observing significant figure rules:

0.424 in x .090 in

A

.038 in^2

47
Q

Multiply the following, observing significant figure rules:

1.7 mm x 4294 mm

A

7300 mm^2

48
Q

Multiply the following, observing significant figure rules:

0.050 m x 102 m

A

5.1 m^2

49
Q

Multiply the following, observing significant figure rules:

324000 cm x 12.00 cm

A

3,890,000 cm^2

50
Q

Divide the following, observing significant figure rules:

23.4 m / 0.50 sec

A

47 m/sec

51
Q

Divide the following, observing significant figure rules:

0.960 g / 1.51 moles

A

0.636 g/mol

52
Q

Divide the following, observing significant figure rules:

12 miles / 3.20 hours

A

3.8 mi/h

53
Q

Divide the following, observing significant figure rules:

1200 m / 12.12 sec

A

99 m/sec

54
Q

Add the following, observing significant figure rules:

  1. 40 m
  2. 022 m
  3. 5 m
A

3.9 m

55
Q

Add the following, observing significant figure rules:

  1. 45 g
  2. 44 g
  3. 9999 g
A

106.89 g

56
Q

Add the following, observing significant figure rules:

  1. cm
  2. 14 cm
  3. 9 cm
A

111 cm

57
Q

Subtract the following, observing significant figure rules:

  1. 306 m
  2. 22 m
A

41.09 m

58
Q

Subtract the following, observing significant figure rules:

  1. 33 g
  2. 468 g
A

10.86 g

59
Q

Subtract the following, observing significant figure rules:

  1. 1 cm
  2. 04 cm
A

172.1 cm

60
Q

Work the following problem, observing significant figure rules:

Three determinations were made of the percentage of oxygen in mercuric oxide. The results were 7.40%, 7.43%, and 7.35%. What was the average percentage?

A

7.39%

61
Q

Work the following problem, observing significant figure rules:

A rectangular solid measures 13.4 cm x 11.0 cm x 2.2 cm. Calculate the volume of the solid.

A

320 cm^3

62
Q

Work the following problem, observing significant figure rules:

If the density of mercury is 13.6 g/ml, what is the mass in grams of 3426 ml of the liquid?

A

46600 g

63
Q

Work the following problem, observing significant figure rules:

A copper cylinder, 12.0 cm in radius, is 44.0 cm long. If the density of copper is 8.90 g/cm^3, calculate the mass in grams of the cylinder. (Assume pi is 3.14)

A

1770 g

AP Chemistry (18 decks)

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