How to find thickness of aluminium foil?

Question

If I have a data:

 

Length of aluminium foil: 13.10 cm

Width of aluminium foil: 9.52 cm

Mass of aluminium foil: 9.745 g

 

How to find the thickness of aluminium foil?

Answer 1

Remember that volume (in cm³) = length in cm  x width in cm  x  thickness in cm

 

so rearrange and solve for thickness:  thickness =  volume / (length x width)

 

Except --- we don't know the volume, but we can figure it out very easily.

 

Go to a reference book (for example, your chemistry textbook, or a periodic table) and look up the density of aluminum.

 

Now you know the mass of Al in 1 cm³ of Al.  Knowing you have 9.745 g of Al, use the density to determine the volume of the foil you have.  Use that information to solve the equation above.