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Understanding the relationship of Mass and Volume. Take out your density HW assignment! NOW! Seriously, stop talking and take out the thing!. Density. The relationship between mass and volume is called density. To find density, divide mass by volume Density = mass/volume D=

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## Understanding the relationship of Mass and Volume

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**Understanding the relationship of Mass and Volume**Take out your density HW assignment! NOW! Seriously, stop talking and take out the thing!**Density**• The relationship between mass and volume is called density. • To find density, divide mass by volume • Density = mass/volume • D= • 1 ml is equal to 1 cm3**Density of pure materials**• The density of water is 1 g/cm3 • This means that the ratio of volume to mass for water is always 1 to 1. • An object composed entirely of copper would have a density of 8.92 g/cm3 • An object composed entirely of aluminum would have a density of 2.7 g/cm3**Practice Problems**• A platinum bar measures 5.0 cm long, 4.0 cm wide, and 1.5 cm thick. It has a mass of 700.0 grams. • Calculate the volume of the platinum bar. • Calculate the density of the platinum bar. • A lead cylinder has a mass of 540 grams and a density of 2.70 g/ml. Calculate the volume of the lead cylinder. • A cork has a mass of 3 grams and a volume of 16 cm3. Calculate the density. • A thin glass bottle holds 25 ml of liquid and has a mass of 19 grams. Calculate the density.**Density problems….**• A sheet of metal is 2 mm wide, 10 cm tall, and 15 cm long. It was 4 grams. What is the density? • A pencil has a density of .875 g/ml. It has a mass of 3.5 grams. What is the volume? • Find the mass of a 50.0 ml quantity of water if the density of water is 1.00 g/ml. • If the density of 45.0 cm3 block of wood is 0.65 g/ml calculate the wood’s mass.

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