Triple Beam Balance and Density

Density

by Elbie Piotrowski

​How do we determine the density of an object?

​We need:

1. The mass of an object (m) AND

2. ​The volume of an object (v)

​

​Determining the volume of a solid cube:

​Determining the Volume of an irregular solid object =

​Final volume - Initial volume

​75 mL - 50 mL = 25 mL

​To calculate density, use the 'triangle' method.

​

Multiple Choice

Calculate the Density in g/cm³ if...

M = 100g and V = 50cm³

• 2

• 5000

• 0.5

• 150

Multiple Choice

A cuboid has dimensions of 2cm, 3cm and 5cm and a mass of 90g. Calculate its density.

• 900 g/cm3

• 3 g/cm3

• 9 g/cm3

• 1800 g/cm3

Multiple Choice

find the mass of an object with a density 0.7 g/cm³ and volume 9 cm³

• 5.4 g

• 1.3 g

• 0.8 g

• 2.7 g

Multiple Choice

find the mass of an object with a density of 1.2 g/cm³ and volume 5 cm³

• 4.17 gram

• 0.24 gram

• 6 gram

• 3.8 gram

Multiple Choice

Calculate the density of the cube.

• 3 g/cm³

• 4 g/cm³

• 2 g/cm³

• 5 g/cm³

Multiple Choice

What is the density of a liquid that has a mass of 27g and a volume of 30ml?

• 0.9 g/ml
• 3 g/ml
• 57 g/ml
• 810 g/ml

Multiple Choice

Frank has an eraser. It has a mass of 4g, and a volume of 2cm³. What is its density?

• 8 g/cm³
• 2 g/cm³
• 1/2 g/cm³
• 24 g/cm³

Multiple Choice

A diamond has a mass of 1.2 g.  If diamond has a density of 3.51 g/mL, what is the volume of the diamond.

• 0.34 mL
• 2.9 g/mL
• 2.3 mL
• 4.2 mL

Multiple Choice

A graduated cylinder is filled with water to a level of 40.0 mL. When a piece of copper is lowered into the cylinder, the water level rises to 63.4 mL. Find the volume of the copper sample.

If the density of the copper is 8.9 g/cm³ , what is its mass?

• 23.4 g

• 0.380 g

• 208 g

• 2.63 g

Multiple Choice

Pure gold has a density of 19.32 g/cm³. How large would a piece of gold be if it had a mass of 318.97 g?

• 6,163 cm³

• 16.51 cm³

• 0.6057 cm³

• 299.7 cm3

Multiple Choice

While digging in the backyard, you find an old coin. Its mass is 26.76 g and its volume is 3 cm³. What is the coin made of?

• Marble

• Quartz

• Copper

• Gold

• Platinum

Multiple Choice

A plastic ball with a volume of 19.7 cm³ has a mass of 15.8 g. Calculate the density of the plastic ball.

Would this ball sink or float in a container of gasoline? Gasoline's density is 0.66-0.69 g/cm³.

• 0.802 g/cm³, Float

• 0.802 g/cm³, Sink

• 1.25 g/cm³, Float

• 1.25 g/cm³, Sink

Multiple Choice

You think you have found a diamond. Its mass is 5.28 g and its volume is 2 cm³. What did you find?

• Marble

• Quartz

• Diamond

• Gold

• Platinum

Multiple Choice

A metal has a density of 8.0 g/ cm3. A solid cube of mass 1.0 kg is made from this metal.

How long is each side of the cube?

• 50 cm

• 2 cm

• 5 cm

• 42 cm

Multiple Choice

The diagrams show four solid blocks with their dimensions and masses.

Which block has the greatest density?

• A

• B

• C

• D

Multiple Choice

Amy has to find the volume of a pencil by using water displacement method. She adds 35 mL of water to a graduated cylinder. She then adds the pencil and reads the new volume. The new volume is 39 mL. Calculate the volume of the pencil.

• 1 mL

• 2 mL

• 3 mL

• 4 mL

Multiple Choice

Find the mass of an object with a density of 1.2 g/cm³ and volume 5 cm³

• 4.17 gram

• 0.24 gram

• 6 gram

• 3.8 gram

Multiple Choice

At which point should your eyes be when you read a graduated cylinder? (Hint: see the letter next to the eye)

• A
• B
• C