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Chemistry - Matter and Change > Chapter 2 Abigail > Flashcards

Chapter 2 Abigail Flashcards

(54 cards)

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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

23
Q

34.61kg - 17.3 kg =

round answers to the correct number of sig figs

24
Q

12.011ng X 6.02X10(23)ng =

round answers to the correct number of sig figs

Study These Flashcards
A

7.23X10(24) ng(2)

25
0.500s/44.02s = | round answers to the correct number of sig figs
0.0114
26
10 434 mL - 9.3344 mL = | round answers to the correct number of sig figs
10425 mL
27
45.5g = ____________mg
4.55 X 10(4)
28
103.8m/31s = | round off answers to the correct number of sig figs
3.3 m/s
29
49g = _________ kg
4.9 X 10(-2) kg
30
1.60 mL = ____________microliters
1.60 X 10(3) microliters
31
5.2 cm = __________ mm
52 mm
32
209 nm = ___________m
2.09 X 10(-7) m
33
The process of assuring the accuracy of a measuring device
calibration
34
When you convert to _____________, you remove the placeholder zeros.
scientific notation
35
method of problem solving that uses conversion factors
dimensional analysis
36
When dividing numbers in scientific notation, what do you do with the exponents?
subtract them
37
T/FAnswers should have no more significant figures than the data with the fewest significant figures.
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
Expresses a number as a multiple of two factors: a number between 1 and 10 and ten raised to a power or an exponent
scientific notation
39
The number of known digits in a measurement plus one estimated digit
significant figures
40
Put these in order from largest to smallest - | centi, giga, kilo, mega, milli, nano, pico
giga mega kilocentimillinanopico
41
list symbol and factor that each represent a) centi b) kilo c) milli
a) c; 1/100b) k; 1000 c) m; 1/1000
42
What is the difference between a base unit and a derived unit?
Base units are defined units based on specific objects or events in the physical world. Derived units are defined by combining base units.
43
A factor of equivalent values used to express the same quantity in different units is -
conversion factor
44
What is a method of problem solving that often uses conversion factors
dimensional analysis
45
The digits reported in an answer are called
significant figures
46
The numeral 9.66 has three significant figures, two known figures and one ______figure
estimated
47
All final ___________to the right of the decimal place are significant.
zeros
48
_______ numbers are always significant
non-zero
49
Zeros that act as ________ are not significant.
placeholders
50
__________ have an infinite number of significant figures.
Counting numbers
51
When you convert to _____________, you remove the placeholder zeros.
scientific notation
52
When multiplying numbers in scientific notation, what do you do with the exponents?
add them
53
When dividing numbers in scientific notation, what do you do with the exponents?
subtract them
54
T/FAnswers should have no more significant figures than the data with the fewest significant figures.
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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