Conversion Factors Dimensional Analysis Lots of Practice

Slides:

Advertisements

Similar presentations

Ch. 2 - Measurement III. Unit Conversions (p.39-41)

Advertisements

Measurement in Chemistry Factor-Label Method

I II III III. Unit Conversions (p ) CH MEASUREMENT.

Dimensional Analysis In which you will learn about: Conversion factors

I II III Unit Conversions MEASUREMENT. A. SI Prefix Conversions 1.Find the difference between the exponents of the two prefixes. 2.Move the decimal that.

V. Units of Measurement VI. Metric System  Quantity - number + unit UNITS MATTER!!

Welcome to the World of Chemistry

Dimensional Analysis Day 1 Are Units important? 3.

Unit 2. Measurement This lesson is 8 days long.

I. Using Measurements (p )

I II III III. Unit Conversions CH. 2 - MEASUREMENT.

Unit 3 Jeopardy Calculations and problem solving..

Scientific Notation Converting into Sci. Notation: Converting into Sci. Notation:  Move decimal until there’s 1 digit to its left. Places moved = exponent.

I II III Measurement & Dimensional Analysis. Learning Objective  The Learners Will (TLW) express and manipulate chemical quantities using scientific.

I II III C. Johannesson III. Unit Conversions CH. 2 - MEASUREMENT.

CH. 1 - MEASUREMENT Unit Conversions.

I II III Units of Measurement Scientific Measurement.

m = 1 ___a) mm b) km c) dm g = 1 ___ a) mg b) kg c) dg L = 1 ___a) mL b) cL c) dL m = 1 ___ a) mm b) cm c) dm Learning.

Measurement in Chemistry Factor-Label Method The Factor-Label Method At the conclusion of our time together, you should be able to: 1.Recognize a problem.

Discuss with your neighbor about your lab What did you determine about the relationship between Temperature and Reaction rate? Why did you design your.

I II III Unit Conversions CH. 1 - MEASUREMENT. A. SI Prefix Conversions mega-M10 6 deci-d10 -1 centi-c10 -2 milli-m10 -3 PrefixSymbolFactor micro-  10.

I. Using Measurements MEASUREMENT IN SCIENCE. A. Accuracy vs. Precision Accuracy - how close a measurement is to the accepted value Precision - how close.

I II III III. Also called the Factor-Label Method for solving problems Dimensional Analysis.

I II III I. Using Measurements MEASUREMENT. A. Accuracy vs. Precision  Accuracy - how close a measurement is to the accepted value  Precision - how.

III. Unit Conversions SI Prefix Conversions Dimensional Analysis

I II III Unit Conversions Chapter 2 MEASUREMENT West Valley High School General Chemistry Mr. Mata.

I II III Unit Conversions CH. 1 - MEASUREMENT. A. SI Prefix Conversions 1.Find the difference between the exponents of the two prefixes. 2.Move the decimal.

Follow along in your text Chapter 1 Section 2 Pages Units of Measure & Conversions.

 A technique for solving problems of conversions.

Converting in and out of the metric system.  Converting in the metric system is easy because it’s all based on unit of ten- Move the decimal!!

I II III Unit Conversions MEASUREMENT. Are Units important? 3 On 9/23/99, $125,000,000 Mars Climate Orbiter entered Mar’s atmosphere 100 km (62 miles)

Measurement I. Units of Measurement  Number vs. Quantity  SI Base Units & Prefixes  Derived Units  Density Calculations.

I. Using Measurements (p )

Dimensional Analysis.

West Valley High School

CH. 1 - MEASUREMENT Unit Conversions.

Dimensional Analysis In which you will learn about: Conversion factors

Measurement Accuracy vs Precision Percent Error Significant Figures

Scientific Notation 65,000 kg  6.5 × 104 kg

Dimensional Analysis In which you will learn about: Conversion factors

Dimensional Analysis In which you will learn about: Conversion factors

Dimensional Analysis In which you will learn about: Conversion factors

Unit 1 - MEASUREMENT III. Unit Conversions

Measurement Accuracy vs Precision SI Units Dimensional Analysis

Dimensional Analysis In which you will learn about: Conversion factors

III. Unit Conversions (p )

III. Unit Conversions (p )

III. Unit Conversions SI Prefix Conversions Dimensional Analysis

Dimensional Analysis In which you will learn about: Conversion factors

Ch. 2 - Measurement III. Unit Conversions (p.39-41)

Ch. 2 - Measurement III. Unit Conversions (p.39-41)

Measurement – The Metric System

MEASUREMENT Unit Conversions.

Intentions for success:

Unit Conversions SI Prefix Conversions Dimensional Analysis

Single-Factor Dimensional Analysis

Equalities State the same measurement in two different units length

III. Unit Conversions SI Prefix Conversions Dimensional Analysis

MEASUREMENT Unit Conversions C. Johannesson.

Measurement and Chemistry.

III. Unit Conversions (p )

Metrics- Unit Conversions

Dimensional Analysis In which you will learn about: Conversion factors

Dimensional Analysis In which you will learn about: Conversion factors

MEASUREMENT Unit Conversions.

West Valley High School

Dimensional Analysis In which you will learn about: Conversion factors

Exploration 1.4 Dimensional Analysis.

Presentation transcript:

Conversion Factors Dimensional Analysis Lots of Practice

A. Conversion Factors Example: 1 in. = 2.54 cm Fractions in which the numerator and denominator are EQUAL quantities expressed in different units Example: 1 in. = 2.54 cm Factors: 1 in. and 2.54 cm 2.54 cm 1 in.

A. Conversion Factors If you know ONE conversion for each type of measurement, you can convert anything! You must memorize and use these conversions Mass: 454 grams = 1 lb 2.2 lbs = 1 kg Length: 2.54 cm = 1 inch 1 mile = 1.609 km Volume: 1 L = 1.06 quarts 1 L = 1000 mL 1 L = 1 dm3 1 mL = 1 cm3

A. Conversion Factors 1. Liters and mL 2. Hours and minutes Write conversion factors that relate each of the following pairs of units: 1. Liters and mL 2. Hours and minutes 3. Meters and kilometers

1. Liters and mL 1 L = 1000 mL 1 L and 1000 mL 1000 mL 1 L 2. hours and minutes 1 hr = 60 min 1 hr and 60 min 60 min 1 hr 3. meters and kilometers 1 km = 1000 m 1 km and 1000 m 1000 m 1 km

B. Dimensional Analysis The “Factor-Label” Method Units, or “labels” are canceled, or “factored” out

B. Dimensional Analysis Steps: 1. Identify starting & ending units. 2. Write down given/1 3. Line up conversion factors so units cancel. 3. Multiply all top numbers & divide by each bottom number. Hit enter ONCE! 4. Check units & answer.

Example How many minutes in 2.5 hours? Conversion factor 2.5 hr x 60 min = 150 min 1 hr cancel UNITS ensure that you have the conversion right side up, and the UNITS are calculated as well as the numbers!

B. Dimensional Analysis How many milliliters are in 1.00 quart of milk? qt mL 1.00 qt 1 L 1.057 qt 1000 mL 1 L = 946 mL 

B. Dimensional Analysis You have 1.5 pounds of gold. Find its volume in cm3 if the density of gold is 19.3 g/cm3. lb cm3 1.5 lb 1 kg 2.2 lb 1000 g 1 kg 1 cm3 19.3 g = 35 cm3

B. Dimensional Analysis How many liters of water would fill a container that measures 75.0 in3? in3 L 75.0 in3 (2.54 cm)3 (1 in)3 1 L 1000 cm3 = 1.23 L

B. Dimensional Analysis Your European hairdresser wants to cut your hair 8.0 cm shorter. How many inches will he be cutting off? cm in 8.0 cm 1 in 2.54 cm = 3.2 in

B. Dimensional Analysis Eastview football needs 550 cm for a 1st down. How many yards is this? cm yd 550 cm 1 in 2.54 cm 1 ft 12 in 1 yd 3 ft = 6.0 yd

B. Dimensional Analysis A piece of wire is 1.3 m long. How many 1.5-cm pieces can be cut from this wire? cm pieces 1.3 m 100 cm 1 m 1 piece 1.5 cm = 86 pieces

Square/Cubic Units Use the conversion factors you already know, but when you square or cube the unit, don’t forget to cube the number also! Best way: Square or cube the ENITRE conversion factor Example: Convert 4.3 cm3 to mm3 ( ) 4.3 cm3 10 mm 3 1 cm 4.3 cm3 103 mm3 13 cm3 = = 4300 mm3

( ) 1000 cm3 1 dm 3 10 cm = 1 dm3 So, a dm3 is the same as a Liter ! ( ) = 1 dm3 So, a dm3 is the same as a Liter ! A cm3 is the same as a milliliter.