Density warm up

What is the density of an object with a mass of 25 grams and volume of 37 cubic centimeters.

Mathematical Equivalence

ON

The mass of a 125 cm³ piece of material is 82.75 g. Determine the density of this material.

• 0.51 g/cm3

• 0.662 g/cm3

• 0.665g/cm3

• 1.51 g/cm3

The table provided gives the densities of four transparent materials A student has a clear block of an unknown substance and needs to determine the identity of the substance. The mass of the block is 23.9 grams. The block displaces 8.8 mL of water when dropped in a graduated cylinder. What is the identity of the substance?

• • Polyethylene

     

• Lucite

• Glass

• Quartz

Determine the density of a sample of an unknown substance with a mass of 6 grams and a volume of 12 cm³.

• 0.5 g/cm3

• 1 g/cm3

• 10 g/cm3

• 5 g/cm3

Determine the density of a sample of an unknown substance with a mass of 6 grams and a volume of 12 cm³.

• Sample 1: volume = 15cm³, mass = 30 g

• Sample 2: volume = 20cm³, mass = 66 g

• Sample 3: volume = 3cm³, mass = 12 g

• Sample 4: volume = 48cm³, mass = 100 g

Which of the following is the correct calculation for determining the density of an object with a mass of 54 g and a volume of 6 mL?

• 6 ÷ 54

• 6 x 54

• 54 ÷ 6

• 6 + 54

A rock with a mass of 70 grams is dropped into a graduated cylinder with 30 mL of water in it. The water level rose as shown. Calculate the density of the rock in g/mL. Record the answer in the bubble chart.

Mathematical Equivalence

ON

Density is a physical property of matter. Density of a substance can be determined by measuring

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and

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Density values are useful when trying to

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an unknown substance.

Water has a density of 1.0 g/mL. Substances like most woods have density values that are

​ ​ ​ ​ ​ ​ (a)  

water and so they float when placed in water. Substances like potato cubes have density values that are

​​ ​ ​ (b)  

water and so they sink when placed in water.​ ​ ​ ​

• greater than
• less than