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Density Worksheet Chemistry I Name _______________________________ Date _______________ Per _____________ Use the equation Density = mass/volume to solve the following problems. Remember to use the correct significant figures and units. Also, be sure write down the given and unknowns and the form of the equation that you will be using. 1. A student has a 70.0 g piece of pure lead. He calculates the volume to be 6.20 cm3. What is the density of lead in g/cm3. 2. The mass of a piece of metal is 20.0 g. It has a volume of 8.0 mL. What is the density of the metal? 3. The density of lead 11.4 g/cm3. If a lead bar has a volume of 354.0 cm3. What is the mass of the lead bar? 4. A piece of copper wire was placed in a graduated cylinder containing 20.0 mL of water. The volume in the cylinder increased to 22.4 mL. If the mass of the copper was 21.4 grams, what is the density of the copper? 5. A gold sphere has a mass of 205 g, if the diameter of the gold sphere is 3.00 cm, what is the density of the gold ball? (Hint: Volumesphere = pi x r3). Armbruster Page 1 3/19/2016 6. A weather balloon is inflated to a volume of 2.2 x 103 L with 37.4 grams of helium. What is the density of helium in g/mL? 7. A solid cube of nickel is 12.3 m x 4.52 cm x 225.0 mm. If the mass of the nickel cube is 1095 grams, what is the density? (Hint: Volumecube = Length x Width x Height) 8. A sample of wood is cut from a telephone pole, it has a mass of 14,825 g. If the pole is 20.00cm long and has a diameter of 30.00 cm, calculate the density of this wood? (Hint: Volumecylinder = pi *r2 * height). 9. A gold sphere has a mass of 205 g, if the diameter of the gold sphere is 3.00 cm, what is the density of the gold ball? (Hint: Volumesphere = pi x r3). 10. What is the width of a gold bouillon that is 10.00 inches in length and 2.00 inches in height and has a mass of 25.31 kg. Density of gold is 19.31 g/cm3. Armbruster Page 2 3/19/2016