Metric Conversions

1
Metric Conversions

• grams (g) is used for mass (weight)
• liters (l) is used for volume
• meters (m) is used for distance
• kilo hecto deka SI deci centi
  milli
• k h dk g d c
  m
• l
• m

2
Metric Conversionskilo hecto deka SI
deci centi milli

• We will use a problem solving process called
  dimensional analysis (tracks).
• Example 25.0 cg _______ g
• 25.0 cg 1 g
• 100 cg 0.250 g
• Example 0.351 hl _______ ml
• 0.351 hl 100,000 ml
• 1 hl 35,100 ml

3
Metric Conversionskilo hecto deka SI
deci centi milli

• Your turns - convert the following
• 15.72 g ______ mg 15.72 g _____ kg
• 15.72 g 1000 mg
• 1 g 15,720 mg
• 15.72 g 1 kg
• 1000g 0.01572 kg

4
Converting Temperature

• F 1.8C 32
• C (F-32) ? 1.8

5
Density m ? v D m/v

• intensive property
• density is the same no matter size
• 50 grams of gold has the same density as 150
  grams of gold.
• Important density to remember
• water is 1.0 g/ml at 4 oC.

6
Density Problem

• A substance has a volume of 1.74 ml and a mass of
  20.0 grams. What is the density?
• What is the substance? Use page 96 of your text.

7
Density Problem

• One more to test your algebra
• What is the volume of ice in a container if the
  density is 0.920 g/ml and the mass is 58.39 g?
• 0.920 g/ml 58.39 g
• V V 63.5 ml