123 School Work

Chemistry and Pennies

• This is a preview of the essay.
  To view the full text you must login!
  
  Using Penny's to Measure Density, and Learn About Experimental Error.
  
  
  Introduction: The purpose of the experiment is to measure and calculate the density of pennies using the found mass and volume, and to identify where error could have encourred. By comparing the densities of pennies from different times, a change of their contents can be determined from the different periods of time. By doing the experiment twice, once with 10 and the other with 40 pennies, the error caused in calculations of only using 10 can be revealed by its comparison to the error of 40.
  Experimental Procedure: To successfully accomplish the experiment a graduated cylinder, a gravimetric balance, and 40 pennies from a certain time period were needed. To begin the experiment, 10 pennies are measured on the gravimetric balance, followed by all 40. Each group was then measured twice in a graduated cylinder at different volumes to account for any error. Successful use of the graduated cylinder required all volumes to be measured using the 10% rule, measuring the volume to one more significant digit than given on the cylinder. Using the data found, the following equation is used to find the density:
  Introduction: The purpose of the experiment is to measure and calculate the density of pennies using the found mass and volume, and to identify where error could have encourred. By comparing the densities of pennies from different times, a change of their contents can be determined from the different periods of time...