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Conversion Factors
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What is a conversion factor?
obtained from an equality (ex. 1 in. = 2.54 cm)
written as a fraction (ratio with a numerator and denominator & inverted to give two conversion factors for every equality.
1 in and 2.54 cm
---- --------
2.54 cm 1 in
Write conversion factors from the equality for litters and mL
1 L and 1000 mL
-----------------
1000ml and 1 L
Write conversion factors from the equality for hours and minutes
1 h and 60 m
--------------
60 m and 1 h
Write conversion factors from the equality for meters and kilometers
1 km and 1000 m
------------------
1000 m and 1 km
How do you solve a problem?
identify the given unit and the needed unit.
What is the given and needed unit for a person that has a height of 2.0 meters?
given
: meters
needed
: inches
An injured person loses 0.30 pints of blood. How many milliliters of blood would that be? Identify the given and needed units given in this problem.
Given
: pints
Needed
: milliliters
How do you do a problem set up for conversion factors?
Unit 1 ......x unit 2 =................... unit 2
.................-------
...................unit 1
given unit ...conversion factor ......needed unit
How many minutes are in 2.5 hours?
Given unit:
Needed unit:
Plan:
Set Up Ptoblem:
Given unit
: hours
Needed unit
: minutes
Plan
: hours -----> minutes
Set Up Ptoblem:
2.5h x 60 m
..........-------
.......... 1 h
answer: 150min (2 SF..significant factors)
Author
Mon
ID
66972
Card Set
Conversion Factors
Description
chemistry, conversion factors
Updated
2011-02-17T06:40:22Z
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