Chemistry Grade 6-8

Chemistry: Density Calculations and Lab Practice

Calculating density, mass, and volume from lab data

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Calculating density, mass, and volume from lab data

Chemistry - Grade 6-8

Instructions: Read each problem carefully. Show your work in the space provided. Include units in your final answers.
  1. 1

    A metal cube has a mass of 54 grams and a volume of 6 cubic centimeters. What is its density?

  2. 2

    A liquid sample has a mass of 40 grams and a volume of 50 milliliters. Calculate the density of the liquid.

  3. 3

    A student measures an unknown solid. The mass is 32 grams and the volume is 4 cubic centimeters. The student says the density is 128 grams per cubic centimeter. Explain the mistake and give the correct density.

  4. 4
    Two graduated cylinders show water before and after a rock is submerged, illustrating water displacement.

    A rock has a mass of 75 grams. When placed in a graduated cylinder, the water level rises from 30 milliliters to 45 milliliters. What is the rock's volume and density?

  5. 5

    An object has a density of 2 grams per cubic centimeter and a volume of 12 cubic centimeters. What is its mass?

  6. 6

    A sample has a density of 4 grams per milliliter and a mass of 36 grams. What is its volume?

  7. 7
    A container with three colored liquid layers stacked by density.

    Three liquids are poured into a container and form layers. Liquid A has a density of 1.2 grams per milliliter, Liquid B has a density of 0.8 grams per milliliter, and Liquid C has a density of 1.0 gram per milliliter. List the liquids from top to bottom.

  8. 8
    A plastic block floating partially above the surface of water in a beaker.

    A plastic block has a density of 0.7 grams per cubic centimeter. Water has a density of 1.0 gram per milliliter. Will the plastic block float or sink in water? Explain your answer.

  9. 9

    A piece of aluminum has a mass of 27 grams and a density of 2.7 grams per cubic centimeter. What is its volume?

  10. 10

    A student collects the following data for four objects: Object W has a mass of 20 grams and a volume of 10 cubic centimeters. Object X has a mass of 18 grams and a volume of 6 cubic centimeters. Object Y has a mass of 12 grams and a volume of 12 cubic centimeters. Object Z has a mass of 30 grams and a volume of 5 cubic centimeters. Which object has the greatest density?

  11. 11
    A sequence showing water displacement in a graduated cylinder when an object is added.

    A graduated cylinder contains 20 milliliters of water. A student adds a small object, and the water rises to 28 milliliters. The object has a mass of 24 grams. Draw or describe the steps needed to find the object's density, then calculate it.

  12. 12

    In a lab, two groups measure the same solid. Group 1 reports a density of 7.8 grams per cubic centimeter. Group 2 reports a density of 5.1 grams per cubic centimeter. Give one possible lab error that could explain the difference.

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