1

Data AnalysisData Analysis

Ch 2Ch 2

2

Units of Measurement Units of Measurement

SI unitsSI units

Base UnitsBase Units

Derived Units Derived Units

3

SI unitsSI units

TimeTime Seconds (s)Seconds (s)

LengthLength Meter (m)Meter (m)

MassMass Kilogram (Kg)Kilogram (Kg)

TemperatureTemperature Kelvin (K)Kelvin (K)

Amount of substanceAmount of substance Mole (mol)Mole (mol)

4

Base UnitsBase Units

TimeTime Seconds Seconds

LengthLength Meter Meter

Mass Mass Kilograms Kilograms

5

Derived UnitsDerived Units

VolumeVolume Cubic centimeters (cmCubic centimeters (cm33))

Density Density Grams per Cubic centimeters (g/cmGrams per Cubic centimeters (g/cm33))

6

TemperatureTemperature

KelvinKelvin

CelsiusCelsius

FahrenheitFahrenheit

7

How to solve a problemHow to solve a problem Read the problem carefully. Read the problem carefully.

Identify what is being asked.Identify what is being asked. Analyze problem. Analyze problem.

List what you know and what you are looking List what you know and what you are looking for.for.

Gather information you may need Gather information you may need Conversions, formulas, tables, etc.Conversions, formulas, tables, etc.

Solve unknown. Solve unknown. Draw if needed. Draw if needed. Write equation or formula, sub in, solve.Write equation or formula, sub in, solve.

Evaluate answer. Evaluate answer. Does it make sense?Does it make sense?

Significant figures! Significant figures!

8

Scientific NotationScientific Notation

Adding and subtractingAdding and subtracting

Multiplying and dividing Multiplying and dividing

9

Dimensional AnalysisDimensional Analysis

Conversion factorConversion factor

Unit multiplierUnit multiplier

10

Reliability Reliability

AccuracyAccuracy

PrecisionPrecision

Percent error = Percent error =

11

Significant FiguresSignificant Figures

12

Significant Figures RulesSignificant Figures Rules Non-zeroesNon-zeroes

Ex: 72.3 g = 3Ex: 72.3 g = 3 Zeroes BETWEEN non zeroesZeroes BETWEEN non zeroes

60.5 g = 360.5 g = 3 Final 0 to right of decimal Final 0 to right of decimal

6.200 g = 46.200 g = 4 Zeroes that are placeholdersZeroes that are placeholders

0.025 g and 320 g = 20.025 g and 320 g = 2 Counting # and defined termsCounting # and defined terms

6 molecules and 60 s = 1 min6 molecules and 60 s = 1 min

13

Rounding Rounding

5 or greater round 5 or greater round UPUP

Less than 5 leave Less than 5 leave samesame

14

Sig Fig MATHSig Fig MATH

Rules for adding and subtractingRules for adding and subtracting

Rules for multiplying and dividing Rules for multiplying and dividing

15

Representing DataRepresenting Data

GraphsGraphs CircleCircle

BarBar

LineLine

SlopeSlope

16

CreditsCredits

Information was gathered from Information was gathered from Chemistry Glencoe bookChemistry Glencoe book

Images were used from Microsoft Clip Images were used from Microsoft Clip ArtArt

Media presentation was created by Media presentation was created by Michelle EstradaMichelle Estrada