# 2.4 Units and Conversions

##### Chad's High School Chemistry Master Course

Quizzes, Study Guides, Chapter Tests, and More!

## The Metric System and SI Units

SI Units
Length m meter
Mass kg kilogram
Time s second
Temperature K Kelvin (K = oC + 273)
Amount of substance mole mole
Electric Current A Ampere (Amp)
Luminous intensity cd candela
Derived Units
Volume m3 cubic meter
Energy / work J Joule
Pressure Pa Pascal
Metric Prefixes
Peta 1015
Terra 1012
Giga 109
Mega 106
kilo 103
centi 10-2
milli 10-3
μicro 10-6
nano 10-9
pico 10-12
femto 10-15
atto 10-18

(All the conversions below are the examples covered in the video lesson at the top of the page.)

## Conversions

Convert 84 inches to feet

Convert 1500m to km

Convert 0.34km to mm

Convert 2.5 feet to inches

Convert 32.1km to m

Convert 0.245 L to mL

## Area and Volume

Convert 1200cm2 to m2

Convert 1200cm3 to m3

## Conversions Involving U.S. and Metric Units

Convert 0.75 ft to cm (1 in = 2.54 cm)

Convert 55 kilometers per hour to meters per second

## Density Calculations (d = m/v)

A cube with 2.00cm edges weighs 10.0 grams. What is its density? How much would a cube of the same substance with 5.00cm edges weigh?