1 / 22

Chemistry Conversions

Chemistry Conversions. Dimensional Analysis and Atoms, Elements, Compounds. SI Prefixes. Converting From One Unit to Another. We will convert A LOT! Uses a technique called Factor Label Method Cancels out units and does the math for you!!. Factor-Label Method for Conversions.

naava
Download Presentation

Chemistry Conversions

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Chemistry Conversions Dimensional Analysis and Atoms, Elements, Compounds

  2. SI Prefixes

  3. Converting From One Unit to Another • We will convert A LOT! • Uses a technique called Factor Label Method • Cancels out units and does the math for you!!

  4. Factor-Label Method for Conversions • Mathematics used Numbers, rather than Quantities • Chemistry uses these same Numbers along with the value’s Units • A Number is useless without its unit • Units give the Number an actual meaning

  5. Conversion Factors • A conversion Factor is needed to go from one unit to another • You must first know how much of one thing is of another before making any conversions • We all know 1 foot is made up of 12 inches SO… • The conversion factor needed to go from feet to inches or from inches to feet is • 1 foot / 12 inches or 12 inches / 1 foot, • Respectively.

  6. Conversion Factors Let’s try using 1 pound = 0.454 Kilograms 1 mile = 1.61 Kilometers 1 inch = 2.54 centimeters 1 gallon = 3.71 Liters

  7. Conversions 1 pound = 0.454 Kg 157 lb 0.454 kg 1 lb The “Heart” of the problem is where the conversion actually takes place. This is where your conversion factor does its work.

  8. Conversions 1 pound = 0.454 Kg 157 lb 0.454 kg 1 lb ( 157 * 0.454 ) / 1 = 71 = 71 kg So yes, with the proper units 157 lb does equal 71 kg, but without units the values are not the same, as we do not know the correct representation numbers.

  9. Units • Units are everything. They give any value an actual meaning and interpretation. • Always carry your units through, rewriting them until you reach a final value, or you will be lost.

  10. English System (American System) Conversions Factors: • 1 foot = 12 inches • 1 yard = 3 feet • 1 mile = 5,280 feet = 1,760 yards • 1 gallon = 16 cups = 4 quarts = 8 pints • 1 pound = 16 ounces

  11. Converting with English Units Question: Convert 15.41 yards to inches: Conversion Factors: • 1 yard = 3 feet • 1 foot = 12 inches

  12. Converting with Metric Units Convert 15.41 yards to inches: 15.41 yd Conversion Factors: • 1 yard = 3 feet • 1 foot = 12 inches

  13. Converting with Metric Units Convert 15.41 yards to inches: 15.41 yd 3 ft 1 yd Conversion Factors: • 1 yard = 3 feet • 1 foot = 12 inches

  14. Converting with Metric Units Convert 15.41 yards to inches: 15.41 yd 3 ft 12in. 1 yd 1ft Conversion Factors: • 1 yard = 3 feet • 1foot = 12inches

  15. Converting with Metric Units Convert 15.41 yards to inches: 15.41 yd 3 ft 12 in. 1 yd 1 ft = (15.4 * 3 * 12) / 1 15.41 yards = 554.76 inches

  16. Metric System Common Metric Prefixes:

  17. Converting with Metric Units Question: Convert 0.248 km to centimeters: Conversion Factors: • 1 Kilometer = 1000 meters • 1 meter = 100 centimeters

  18. Converting with Metric Units Covert 0.248 km to centimeters: 0.248 km Conversion Factors: • 1 Kilometer = 1000 meters • 1 meter = 100 centimeters

  19. Converting with Metric Units Covert 0.248 km to centimeters: 0.248 km 1000 m 1 km Conversion Factors: • 1 Kilometer = 1000 meters • 1 meter = 100 centimeters

  20. Converting with Metric Units Convert 0.248 km to centimeters: 0.248 km 1000 m 100 cm 1 km 1m Conversion Factors: • 1 Kilometer = 1000 meters • 1 meter = 100 centimeters

  21. Converting with Metric Units Convert 0.248 km to centimeters: 0.248 km 1000 m 100 cm 1 km 1m = (0.248 * 1000 * 100) / 1 = 24,800 centimeters Much Easier!

  22. Calculations: Metric Vs. American System? Just count the zeros and move the decimal spot to the left or the right.

More Related