# AIM: How do we convert units using conversion factors?

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AIM: How do we convert units using conversion factors?
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

WHAT IS 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 = 0.001km 1000

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

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

LET’S TRY SOME 1km = 1 1000mm=1 m m 1000m = 1 1 m = 1 km mm
1m = cm = 1 cm m 1000 1 1 1000 100 1

How many milliliters (mL) are in 0.851Liters (L)?
SET UP How many milliliters (mL) are in 0.851Liters (L)? Set up a proportion 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 1000 1

Units you want to get rid off MUST BE in the DENOMINATOR
Set up a proportion Units you want to get rid off MUST BE in the DENOMINATOR Multiply out CHECK! 0.851L x mL L 1000 = x mL 1000 = 851mL 1 0.851L = 851mL 0.851L = 851 (10-3)L

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

METRIC MANIA Worksheet
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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