Penny Isotopes

Materials

Procedures

  1. Take the mass of 10 pre-1982 pennies by using a balance and find the average mass of a pre-1982 penny by taking the total mass and divided by 10.
  2. Take the mass of 10 post-1982 pennies and find the average mass.
  3. Take the mass of 10 “mystery” pennies in a metal canister.
  4. Find the mass of the 10 “mystery” pennies by subtracting step #3 by the mass of the canister, which is 78.49g.
  5. Find the number of pre-1982 and post-1982 “isotope” in the "mystery" sample by using the equation:
X Y + (10 − X) Z = M

Data

mass of 10 pre-1982 pennies ???
average mass of pre-1982 pennies (Y) ???
mass of 10 post-1982 pennies ???
average mass of post-1982 pennies (Z) ???
mass of 10 "mystery" pennies and metal canister ???
mass of metal canister 78.49 g
mass of 10 "mystery" pennies (M) ???
number of pre-1982 pennies in the canister (X) ???
number of post-1982 pennies in the canister (10 − X) ???
% of pre-1982 "isotopes" in "mystery" pennies ???
% of post-1982 "isotopes" in "mystery" pennies ???

Analysis

Worksheet



How to do this assignment?

Chemistry in August