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Chemistry - Matter and Change > Chapter 2 Abigail > Flashcards

Chapter 2 Abigail Flashcards

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1
Q

The base unit of length in the SI System is the

A

meter

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2
Q

The exactness of a measurement in indicated by its number of -

a) accurate digits
b) algorithms
c) conversation factors
d) significant digits

A

D - significant digits

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3
Q

The SI Prefix meaning “one thousand” is

a) centi
b) kilo
c) milli
d) nano

A

B - kilo

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4
Q

The units used to express measurements such as speed, area, and volume are called ____ units.

a) precise
b) derived
c) significant
d) basic

A

B - derived

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5
Q

Which of the following is NOT required in order to make a measurement?

a) a method of making a comparison
b) a standard with which to compare what is being measured
c) knowledge of exactly what is to be measured
d) units that are based on the English system of measurement

A

D - Units that are based on the English system of measurement

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6
Q

The SI base unit for the measurement of mass is the

A

kilogram

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7
Q

A balance is used to determine the -

a) mass of an object
b) length of an object
c) density of an object
d) temperature of an object

A

A - mass of an object

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8
Q

Which metric unit is most appropriate for measuring the distance between Tuscaloosa, AL and Carrollton, AL -

a) meter
b) millimeter
c) kilometer
d) megameter

A

C - kilometer

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9
Q

The base unit of time in the SI system is

A

second

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10
Q

Write in scientific notation:9 367 421

A

9.367421 X 10(6) (can’t make superscripts so the (6) should really be a superscript. Same throughout all these notecards

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11
Q

810 540 - scientific notation

A

8.10540X 10 (2)

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12
Q

0.00112 - scientific notation

A

1.12 X 10(-3)

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13
Q

0.7210 - scientific notation

A

7.210 X 10(-1)

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14
Q

0.1000003030 - scientific notation

A

1.000003030 X 10(-1)

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15
Q

87.073 meters - round to three sig figs

A

87.1 meters

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16
Q

4.3621 X 10(8) meters - round to three sig figs

A

4.36 X 10(8) meters

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17
Q

0.015 52 meter - round to three sig figs

A

.0155 meters

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18
Q

9009 meters - round to three sig figs

A

9010 meters

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19
Q

1.777 X 10(-3) meter - round to three sig figs

A

1.78 X 10(-3) meters

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20
Q

629.55 meters - round to three sig figs

A

6.30 X 10(2) m

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21
Q

2.30m X 3.65m X 0.55m =

round off the answers to the correct number of sig figs

A

4.6 m(3)

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22
Q

61.2m + 9.35m + 8.6m =

round off answers to the correct number of sig figs

A

79.2 m

23
Q

34.61kg - 17.3 kg =

round answers to the correct number of sig figs

A

17.3 kg

24
Q

12.011ng X 6.02X10(23)ng =

round answers to the correct number of sig figs

A

7.23X10(24) ng(2)

25
Q

0.500s/44.02s =

round answers to the correct number of sig figs

A

0.0114

26
Q

10 434 mL - 9.3344 mL =

round answers to the correct number of sig figs

A

10425 mL

27
Q

45.5g = ____________mg

A

4.55 X 10(4)

28
Q

103.8m/31s =

round off answers to the correct number of sig figs

A

3.3 m/s

29
Q

49g = _________ kg

A

4.9 X 10(-2) kg

30
Q

1.60 mL = ____________microliters

A

1.60 X 10(3) microliters

31
Q

5.2 cm = __________ mm

A

52 mm

32
Q

209 nm = ___________m

A

2.09 X 10(-7) m

33
Q

The process of assuring the accuracy of a measuring device

A

calibration

34
Q

When you convert to _____________, you remove the placeholder zeros.

A

scientific notation

35
Q

method of problem solving that uses conversion factors

A

dimensional analysis

36
Q

When dividing numbers in scientific notation, what do you do with the exponents?

A

subtract them

37
Q

T/FAnswers should have no more significant figures than the data with the fewest significant figures.

A

True
Example: if calculating density and the mass has 4 significant figures and volume has three, then the answer should have no more than three significant figures

38
Q

Expresses a number as a multiple of two factors: a number between 1 and 10 and ten raised to a power or an exponent

A

scientific notation

39
Q

The number of known digits in a measurement plus one estimated digit

A

significant figures

40
Q

Put these in order from largest to smallest -

centi, giga, kilo, mega, milli, nano, pico

A

giga mega kilocentimillinanopico

41
Q

list symbol and factor that each represent

a) centi
b) kilo
c) milli

A

a) c; 1/100b) k; 1000 c) m; 1/1000

42
Q

What is the difference between a base unit and a derived unit?

A

Base units are defined units based on specific objects or events in the physical world. Derived units are defined by combining base units.

43
Q

A factor of equivalent values used to express the same quantity in different units is -

A

conversion factor

44
Q

What is a method of problem solving that often uses conversion factors

A

dimensional analysis

45
Q

The digits reported in an answer are called

A

significant figures

46
Q

The numeral 9.66 has three significant figures, two known figures and one ______figure

A

estimated

47
Q

All final ___________to the right of the decimal place are significant.

A

zeros

48
Q

_______ numbers are always significant

A

non-zero

49
Q

Zeros that act as ________ are not significant.

A

placeholders

50
Q

__________ have an infinite number of significant figures.

A

Counting numbers

51
Q

When you convert to _____________, you remove the placeholder zeros.

A

scientific notation

52
Q

When multiplying numbers in scientific notation, what do you do with the exponents?

A

add them

53
Q

When dividing numbers in scientific notation, what do you do with the exponents?

A

subtract them

54
Q

T/FAnswers should have no more significant figures than the data with the fewest significant figures.

A

TrueExample: if calculating density and the mass has 4 significant figures and volume has three, then the answer should have no more than three significant figures

Chemistry - Matter and Change (6 decks)

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