The Metric System and Dimensional Analysis Use the

The Metric System and Dimensional Analysis

� Use the metric system because it is based on powers of 10 and __________ � To measure with the metric system: ◦ Length or Distance: meters (1 yard =. 92 meters) ◦ Mass or Weight: grams (1000 g = 2. 2 lb) ◦ Volume: liters (1 cm 3 = 1 m. L) (1 dm 3 = 1 L)

Dimensional Analysis � To perform conversions use Dimensional Analysis � 1 wag = 12 zoom 1000 warp = 1 bam 3 zoom = 1 bam � How many wags in 51 warps?

� How many zooms in 257 bam? � How many wags in 22 zoom?

Metric Unit Conversions � Now for some real chemistry units! Look at Table C Metric Practice. � Conversion Factor: A ratio between 2 measurements. � Ex. 2. 54 cm = 1 inch � How many cm are there in 15. 2 inches? ◦ 15. 2 inch 38. 608 2. 54 cm = 38. 608 cm cm 1 inch *The inches cancel out just like 4/4 =1 inch/inch =1

Metric Unit Conversions � How many inches are there in 15. 2 cm? � 15. 2 cm 1 in = 5. 984 inches 2. 54 cm 1. Start with what you’re given 2. Put the units on the bottom to cancel 3. Multiply across the top hit equals and divide by the bottom

Metric Unit Conversion Practice � More Practice: � How many c. L are in 205 L? (c. L is centiliters) � How � DO many μg in 22. 1 g? (μg is micrograms) NOT JUST MOVE THE DECIMAL!