109 Mass and Density

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10-9 Mass and Density

• In todays lesson we learn to calculate the mass
  and density of an object.

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Mass and Density

• Mass the mass of an object is the measure of
  the amount of matter it contains. In the metric
  system, we use grams (g), kilograms (kg) and
  metric ton (t).
• Density the mass per unit volume of a substance
  is its density. When describing densities, we use
  a slash (/) for the word, per. (Example the
  density of gasoline is 0.66kg/l which means
  that a liter of gasoline weighs 0.66 kg your
  science teacher would not be happy with my
  example).

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Mass and Density

• The formula for calculating mass is
• Mass Density x Volume
• You will need to have/use the following
  conversion chart
• 1 L 1000 cm3
• 1 mL 1 cm3
• 1 m3 1000 L
• You will also need the tables on page 382 to
  solve the problems for todays assignment.

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Examples

• What is the mass of 3L of water?
• Using Table 2, the mass of 1 L of water 1.00 kg
• So 3 L of water would be 1.00(3) 3 kg

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Example

• What is the mass of 2 cm3 of gold?
• 1 cm3 of gold 19.3 g/cm3
• 2 cm3 of gold 2(19.3) 38.6 g
• LABEL YOUR ANSWERS CORRECTLY!