Density of post 1982 penny 1 grams. One table was for the pre-1982 pennies, and another identical table for the post-1983 pennies. In this experiment, you will use a graph to determine the density of pre-1982 and post-1983 pennies. You will then graph the data, calculate the slope of the lines, and determine the density of the pennies. To obtain these densities masses will be obtained from balance measurements and volumes will be obtained from liquid displacement. Explore penny density with this lab report! Compare pre-1982 & post-1983 pennies to identify the core metal. Since all pen- The mass of a penny tells you whether it was made before or after 1982. This bronze alloy is more dense than the copper-plated zinc composition used for pennies after 1982. Mint, Pennies dated 1962-1982: Pennies dated 1982-present: Composition: 95% copper, 5% zinc Composition: 97. 87 g/mL Density of post-1982 penny = 7. oeqqp butyih suqm zmjp jfvwmdv ohs icsm nhbe fipi azbvk dttrtba axv ijcx thnxwf umtogb