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Unit 2 MATH OF CHEMISTRY 2.3 How do we convert units? AIM: How do we convert units using conversion factors? DO NOW: This is review from Thursday: Try.

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Presentation on theme: "Unit 2 MATH OF CHEMISTRY 2.3 How do we convert units? AIM: How do we convert units using conversion factors? DO NOW: This is review from Thursday: Try."— Presentation transcript:

1 Unit 2 MATH OF CHEMISTRY 2.3 How do we convert units? AIM: How do we convert units using conversion factors? DO NOW: This is review from Thursday: Try the following questions using Table C 1km = _______________m 800cm = _______________m 9mm= _________________m

2 WHAT IS CONVERSION FACTOR? Conversion factor is a fraction that helps us convert from one unit to another Example: 1m = ? Km 1m x 1km= 1km 1000m 1m = 0.001km 1000 = 0.001km

3 HOW DO YOU SET UP A CONVERSION FACTOR? 1 m 100cm Unit you want to end up with Unit you want to Get rid off 300cm x=300m 100 m

4 REMEMBER! SMALLER #, LARGER UNIT LARGER #, SMALLER UNIT 1 m 100cm

5 LETS TRY SOME 1km = 11000mm=1 m m 1000m = 11 m = 1 km mm 1m = 1100cm = 1 cm m

6 SET UP How many milliliters (mL) are in 0.851Liters (L)? 1.Set up a proportion 2.Units you want to get rid off MUST BE in the DENOMINATOR What you know x (unit you want) (unit you want to get rid of) 0.851L x mL L

7 1.Set up a proportion 2.Units you want to get rid off MUST BE in the DENOMINATOR 3.Multiply out 4.CHECK! 0.851L x mL L = x mL1000= 851mL 0.851L = 851mL 0.851L = 851 (10 -3 )L

8 TRY ON YOUR OWN 1.Set up a proportion 2.Units you want to get rid off MUST BE in the DENOMINATOR 3.Multiply Out 4.Check! How many meters are in 1.57 km? How many kilograms are in 10.5g?

9 NEXT Complete the METRIC MANIA Worksheet When you are done, you may work on the following: CHEMISTRY VOCABULARY JOURNAL - you will be allowed to use this on your quizzes and (some of) your exams


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