UNIT CONVERSIONS

HEBDEN Pg 9-16

Introduction

• Familiar with

77

2 = 2

7

2

SIMPLIFIED VERSION

have

wanthave = want

CONVERSION FACTOR

How many g are there in a mg?

g

mg310

1

CONVERSION FACTOR

mg

prefixBase unit

CONVERSION FACTOR

0.007 mg = ? g

STEP 1: Change Value into Scientific Notation

mg3107

STEP 2:Conversion factor

0.007 mg = ? g

mg

gmg3107

CONVERSION FACTOR

Unit we want

Unit we have

CONVERSION FACTOR

0.007 mg = ? g

mg3107 mg

g

1

10 3

STEP 3:Put 1 Next to prefix

g6107

Whole Numbers

01033

Simple Conversions - 1

5 ng = ? g

ng0105ng

g

1

10 9

g9105

Simple Conversions - 2

0.0006 uL = ? L

L4106 L

L

110 6

L10106

Simple Conversions - 3

35 000 ng = ? g

ng4103ng

g

1

10 9

g5105.3

Hebden

Pg 21 of Text 17 a-f (try “g”)

Double Conversion

60 000 mg = ? Gg

prefix 1 base unit prefix 2

mg g Gg

Double Conversion

mg g

g Gg

Double Conversion

60 000 mg = ? Gg

mg4106mg

g

1

10 3

g1106

g1106g

Gg910

1 Gg8106

Double Conversion

5 dL = ? uL

5 dL = ? uL

L

5 dL = ? uL

Double Conversion

dL0105dL

L

1

10 1

L1105

L1105 L

L610

1

L5105

Double Conversion

6 pm = ? km

pm0106pm

m

1

10 12

m

km310

1

km15106

Time Units

Time units – don’t need scientific notation

s60

min1

min60

1hr

How many?

How many seconds in a year (365 days)?

Plan: 1a d h min s

a1a

d

1

365

d

h

1

24

h1

min60

min1

60s

ss 71016224.3400,622,31

Converting Bottom Unit

0.008 mL/s = ? mL/min

min

48.0

min1

60008.0 mls

s

ml

Converting Bottom Unit

4 Kg/L = ? Kg/mL

mL

Kg

mL

L

L

Kg 231 100.4

1

10100.4

Complex Unit Conversion

5.6 ug/mL = ? ng/L

g

5.6 ug/mL = ? ng/L

mL

ug0106.5 g

g

110 6

g

ng910

1

L

mL310

1

L

ng6106.5

Complex Unit Conversion

Complex Unit Conversion

400 g/cL = ? mg/L

cL

g2104g

mg310

1

L

cL210

1

L

mg7104

Complex Unit Conversion

0.008 mg/mL = ? Kg/L

mL

mg3108 mg

g

1

10 3

g

Kg310

1

L

mL310

1

L

Kg6108

Complex Unit Conversion

0.003 ng/s = ? mg/min

s

ng3103 ng

g

1

10 9

g

mg310

1

min1

60s

min60103 9 mg

min108.1 7 mg

Hebden

Pg 21 of Text 17 (l-o)Assignment #6