Penny Lab

Good Essays
522 Words
Grammar
Plagiarism
Writing
Score
Penny Lab
Percent Composition of a Penny

Questions Answer in complete sentences SHOW ALL MATH FOR CREDIT! INCLUDE UNITS & SIG FIGS IN ALL ANSWERS! 1. Write the balanced equation for the reaction. Include (states). 2. Calculate the mass of zinc found in the penny. 3. Calculate the mass of copper in the penny. 4.

You May Also Find These Documents Helpful

• Good Essays

The main goal of this experiment was to obtain the density of pennies throughout multiple decades and determine when the composition was changed by observing when the density of the penny changed. This was done by obtaining the mass of the penny using a scale and the volume of the penny using a graduated cylinder. By using D = M/V it was possible to obtain the density of a penny of a…

• 603 Words
• 2 Pages
Good Essays
• Good Essays

Questions to answer to help guide the development of procedures for the determination of the percent copper and zinc in pennies through titration and gravimetric techniques:…

• 623 Words
• 3 Pages
Good Essays
• Good Essays

Chm 130 Lab 7

• 1376 Words
• 6 Pages

zinc and the hydrochloric acid combined to create zinc chloride. You know the mass of zinc used, and the mass of zinc chloride…

• 1376 Words
• 6 Pages
Good Essays
• Good Essays

The purpose is to determine the percent composition of Zinc and Copper metals in a post-1983 penny with the use of HCl.…

• 674 Words
• 3 Pages
Good Essays
• Powerful Essays

Objectives: The lab experiment will consist of oxidation-reduction and double displacement reactions as well as titration techniques. All these components will be used in order to determine the percent composition of pennies. In conducting redox and double displacement we are able to analyze a penny and figure out the chemical composition of the product. The experiment entails careful observations and recording of evidence for a chemical reaction. In this experiment observe gases being produced, the forming of precipitation and color changes.…

• 754 Words
• 3 Pages
Powerful Essays
• Satisfactory Essays

Experiment 4a

• 440 Words
• 2 Pages

The purpose of this lab is to create an experiment where zinc reacts with hydrochloric acid in order to find out the number of moles and atoms of zinc reacted. This can be accomplished by weighing the sample before and after the reaction with hydrochloric acid.…

• 440 Words
• 2 Pages
Satisfactory Essays
• Good Essays

Before 1982 the US penny was made of pure copper. Because of the high cost of copper, the US government changed the composition of the penny. As of 1982, pennies have been made of mostly zinc, with a thin copper layer on the outside. The first step in finding the % of copper is to make solution out of the penny. In other words “liquefy” the penny. To differentiate between the copper and zinc; zinc is clear and copper turns blue. During this lab, we will be making several standard solutions of this penny solution. To find out each solutions concentration, we will find its molarity by using the formula:…

• 916 Words
• 5 Pages
Good Essays
• Satisfactory Essays

1. Write a balanced equation for each reaction observed in this lab. (10 points total, 2 points each)…

• 340 Words
• 2 Pages
Satisfactory Essays
• Satisfactory Essays

lab 3

• 438 Words
• 3 Pages

What is the IP address of the DHCP server from which W2K8yy has obtained its IP address?…

• 438 Words
• 3 Pages
Satisfactory Essays
• Good Essays

LAB 3

• 368 Words
• 2 Pages

1. What are the three fundamental elements of an effective access control solution for information systems?…

• 368 Words
• 2 Pages
Good Essays
• Powerful Essays

Stickleback Lab

• 3141 Words
• 13 Pages

The purpose of the research was to formulate a question and develop a hypothesis based on the variations observed between two populations of threespine stickleback, in order to gain a better understanding of natural selection and evolution. Measurements were taken of the number of scutes, ventral length and standard length in Population A. Population B data was provided by instructor. Four null hypotheses were formed on each of the measurements taken, the last hypothesis being no difference between populations. Data was collected from classmates and then compiled together into an excel spreadsheet. Using the spreadsheet, determined confidences intervals and looked for overlapping in the populations. From the confidence interval, it was concluded that there was a significant change between the populations. All of the hypotheses were rejected except for one. Thus proving phenotypic variation and natural selection occurred.…

• 3141 Words
• 13 Pages
Powerful Essays
• Good Essays

My hypothesis that the pennies made after 1982 would be denser than those minted later was supported by the experiment. The collected data shows that the older pennies have a density of 7.6g/mL ± .5g/mL. This density is closest to the density of zinc, which has a density of 7.19. The newer pennies have a density of 8.07 g/mL ± 1g/mL. This density is closest to the density of nickel, which has a density of 8.85 g/mL. The percent error for the density of the older…

• 358 Words
• 2 Pages
Good Essays
• Better Essays

Lab Penny Ante 2

• 1080 Words
• 4 Pages

1. Each member of the group chooses a defined role: (a) reactant, (b) product, (c) monitor, and (d) recorder.…

• 1080 Words
• 4 Pages
Better Essays
• Satisfactory Essays

Bird Lab

• 432 Words
• 6 Pages

In this inquiry lab, we explored natural selection using a laboratory. We wanted to see…

• 432 Words
• 6 Pages
Satisfactory Essays
• Satisfactory Essays

Penny Lab

• 346 Words
• 2 Pages

First we picked who would drop the water onto the penny. We did this to ensure that the drops were even in size. We then carefully dropped water from the dropper onto the head side of the penny while counting the number of drops.…

• 346 Words
• 2 Pages
Satisfactory Essays