Concept: Density () of a substance is defined as mass (m) divided by volume (V).

Question

Concept:

Density () of a substance is defined as mass (m) divided by volume (V).

[ ho=rac{m}{V}] =mV

Question:

The mass and volume (try to use two approaches to measure the volume) of an unknown pure metal block are measured in laboratory. Mass is 100 g, and volume is 11.2 cm3. What is this pure metal block made of?

The following link provides a list of densities of pure metals.

https://sites.google.com/site/chempendix/densities-of-pure-metals (Links to an external site.)

  
Copper

Lead
  
Zinc

  
Aluminum

Explanation / Answer

d = m/V

d = 100 g / 11.2 cm3 = 8.9286 g/cm3

According to this value, and the list of density of metals:

Zinc = 7.14 g/cm3

Lead = 11.3 g/cm3

Copper = 8.96 g/cm3

The answer is Copper (Cu).

Hope this helps

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