CHM130 Lecture Day 2

Dimensional AnalysisMetric Conversions

Units of Measure Metric/Metric Conversions English/Metric Conversions Metric/English Conversion

Temperature ScalesFahrenheitCelsiusKelvinTemperature Conversions

Dimensional Analysis

Gasoline is $3.50 per gallon. Calculate the amount of gas that can be purchased with $50.00

What is given??__________

What is the unknown??__________

What is the conversion factor??______________

Set up the problem

Metric Conversions

Units of Measure

Powers of 10http://www.wordwizz.com/pages/10exp25.htm

http://www.unc.edu/~rowlett/units/prefixes.html

tera- (T-) 1012 1 trilliongiga- (G-) 109 1 billionmega- (M-) 106 1 millionkilo- (k-) 103 1 thousandhecto- (h-) 102 1 hundreddeka- (da-) 101 tenUnit of measuredeci- (d-)10-1 1 tenthcenti- (c-)10-2 1 hundredthmilli- (m-)10-3 1 thousandthmicro- (µ-)10-6 1 millionthnano- (n-)10-9 1 billionthpico- (p-)10-12 1 trillionthfemto- (f-)10-15 1 quadrillionth

kilo- (k-) 103 1 thousandhecto- (h-) 102 1 hundreddeka- (da-) 101 ten

gram (g)Unit of measure meter (m)

liter (L)

deci- (d-)10-1 1 tenthcenti- (c-)10-2 1 hundredthmilli- (m-)10-3 1 thousandth

Metric/Metric Conversions

kilo hecto deca Unit of measure deci centi milli $1000 $100 $10 $1 10 cents 1 cent 1 cent

K h da gram (g) d c mLiter (L)meter (m)

kg hg dag g dg cg mg

kL hL daL L dL cL mLkm hm dam m dm cm mm

English/Metric ConversionMetric/English Conversion

2.54 cm = 1 inch946 mL = 1 quart454 grams = 1 pound

The distance from Mesa to Tucson is about 120 miles. Calculate the distance from Mesa to Tucson in kilometers. (Use 2.54 cm per 1 inch)

Temperature Scales Fahrenheit Celsius Kelvin

Temperature Conversions1. Celsius to Kelvin or Kelvin to Celsius

Temperature Conversions- Formula1.Celsius to Fahrenheit or Fahrenheit to Celsius

oC = 5 (oF-32) 9

oF = 9 oC + 32 5

Temperature Conversions- 40 MethodA. Celsius to Fahrenheit or Fahrenheit to Celsius

1. Add 40100 oC to oF 32 oF to oC

2. Multiply or divide by 1.8

3. Subtract 40