1.2.1 Chapter 2
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Metric)Units of measurement) Length
Meter
Metric)Units of measurement) Volume
Liter
Metric)Units of measurement) Mass
Gram
Metric)Units of measurement) temperature
Degree celsius
Metric)Units of measurement) time
Second
Metric)abbreviations) meter
m
Metric)abbreviations) Liter
L
Metric)abbreviations) Gram
g
Metric)abbreviations) Degree Celsius
*C
Metric)abbreviations) second (s)
s
SI) units of measurement) Length
Meter
SI) units of measurement) volume
Cubic meter
SI) units of measurement) Mass
Kilogram
SI) units of measurement) temperature
Kelvin
SI) units of measurement) Time
Second (s)
SI) Abbreviations) meter
m
SI) Abbreviations) Cubic meter
m^3
SI) Abbreviations) Kilogram
kg
SI) Abbreviations)kelvin
K
SI) Abbreviations) second (s)
s
What are measured numbers?
Numbers that are measured by some instrument
What are exact numbers?
Those numbers that are obtained by counting items
rules for sig figs) Rule #1: A number is a sig fig if it is... (4)
-not a zero
-one or more zeros between nonzero digits
-one or more zeros at the end of a decimal number
-in the coefficient of a number written in scientific notation
rules for sig figs) Rule #2: a zero is not significant if it is...(2)
-at the beginning of a decimal number
-used as a placeholder in a large number without a decimal point
Sig figs in calcuration for rounding) rules for addition and subtraction
Final answer is written so that is has the same number of decimal places as the measurement having the fewest decimal placesĀ
ex) 4.55 + 5.2= answer should be in 1 decimal spot so tenths for this one
Sig figs in calcuration for rounding) rules for multiplication and division
Final answer is written with same number of sigfigs as the measurement with the fewest SFs
ex) 4.55 x 5.2= final answer should be rounded to 2 SFs
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Author:
efrain12
ID:
323565
Filename:
1.2.1 Chapter 2
Updated:
2016-09-25 04:59:50
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Chemistry
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Chapter 2
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