ch3 aluminum foil lab
If you missed the lab, use my information: Foil mass 4.58g ; foil length 29cm; foil width 21cm; old pennies are about 3.1g, new pennies about 2.5g.
Also, when done, put your data & results on the form ; everyone must do this page and the form.
get bolded measurements first! You can do calculations later, if need be.
Aluminum Foil lab Name__________________pd_______
Purpose: Calculate the thickness of a piece of aluminum foil, then calculate the number of atoms present in the foil
Procedure, Measurements, and Calculations:
1. Use the density of aluminum (density worksheet or text or internet) and the mass of your piece of foil to find the volume. Be sure to show the work and formula below, labeling your answers.
Mass_____________ Calculation of volume:
Density___________
2. Use the volume from above, the length and width of your foil to calculate thickness (height) of your foil.
Volume___________ Calculation of thickness:
Length____________
Width_____________
3. Use the mass of your foil and the atomic mass of aluminum to find the moles of aluminum. Do you have more or less than 1 mole? _________
mass_________ Calculation of moles: (use dimensional analysis)
atomic mass Al_________
4. Use the moles of aluminum from above and Avogadro’s number to find the number of atoms of aluminum in your foil.
Moles of aluminum_________ Calculation of atoms: (use dimensional analysis)
Avogadro’s number ____________
5. Using the number of atoms from above and the population of the world, find out how many atoms you could give each person in the world. ( you will have to use scientific notation) Can you give each person more than 1million atoms?____
# atoms in your foil___________ Calculation of atoms per person:
population of the world ________ (round to 2 or 3 digits)
6. Divide the thickness of the foil by the diameter of an atom to find out how many atoms thick the foil is. (you will need to use scientific notation) Is it more than 10,000 atoms thick? ___________ Calculation of atoms thick:
thickness____________
diameter of an atom 2.86 *10-8cm
7. Find the number of moles and the number of atoms in an old penny. (Old pennies are mainly copper) , then repeat with a new penny (they are mainly zinc) Hint: you will have to weigh them. (if you didn't have time to mass them, their masses are at the top of the page, or can be googled)
Work: (use dimensional analysis)
8. when done, put your data & results on the form