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Provide an image of the completed graph    b. Was the material that you evaluated real gold, or Fool's gold? How do you know?

Provide an image of the completed graph    b. Was the material that you evaluated real gold, or Fool's gold? How do you know?

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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a. Provide an image of the completed graph 

 

b. Was the material that you evaluated real gold, or Fool's gold? How do you know?

Mass would be plotted along the y-axis, and Volume would be plotted along the x- axis. Special Instructions (if any) N/A Procedure Exercise 01 - Creating XY Scatter Plot and Linear Regression Analysis Not long after you move into an old house, you find a small wooden box in the attic full of what appears to be different sized solid pieces that appear to be gold. Did you just discover a fabulous treasure, or not? After running a quick Google search, you discover that gold and fool's gold (pyrite) look very similar, so how can you determine the identity of the material in the box? Fool's Gold Figure 01: Fool's gold vs. real gold. There is a simple experiment that you could conduct to help identify the type of metal, based on density. Real Gold The density of any material is equal to the mass of the sample divided by the volume of the sample, and every substance has a unique density value. Equation 01 D = m/v D = Density m = mass (in g) v = Volume (in mL or cm3) Density is an intensive property, i.e. a property that is the same regardless of amount of material. So, if you were to measure the mass and volume of several pieces of your "gold", you could then calculate a density for the material, and from that, determine whether the metal is real gold or pyrite.
Transcribed Image Text:Mass would be plotted along the y-axis, and Volume would be plotted along the x- axis. Special Instructions (if any) N/A Procedure Exercise 01 - Creating XY Scatter Plot and Linear Regression Analysis Not long after you move into an old house, you find a small wooden box in the attic full of what appears to be different sized solid pieces that appear to be gold. Did you just discover a fabulous treasure, or not? After running a quick Google search, you discover that gold and fool's gold (pyrite) look very similar, so how can you determine the identity of the material in the box? Fool's Gold Figure 01: Fool's gold vs. real gold. There is a simple experiment that you could conduct to help identify the type of metal, based on density. Real Gold The density of any material is equal to the mass of the sample divided by the volume of the sample, and every substance has a unique density value. Equation 01 D = m/v D = Density m = mass (in g) v = Volume (in mL or cm3) Density is an intensive property, i.e. a property that is the same regardless of amount of material. So, if you were to measure the mass and volume of several pieces of your "gold", you could then calculate a density for the material, and from that, determine whether the metal is real gold or pyrite.
The density values for the two materials are: Gold: 19.3 g/cm³ Pyrite: 4.8 g/cm³ To conduct the experiment, you collect 7 different sized pieces and weigh each piece. You also determine the volume of each piece using a displacement method that will be discussed in Lab 01. Briefly, this method involves taking a known amount of water, plunging an object in the water and observing the differential volume of the object (i.e. the displaced volume). After measuring the volume in mL, you can convert those values to cm³, using the conversion factor 1 mL = 1 cm³. After completing your measurements, you have collected the following data: Table 01. Mass vs. Volume Data for Exercise 01. Y Mass (g) 6.210 7.243 X Vol (cm³) 1.26 1.51 2.00 2.37 2.48 2.68 3.10 9.778 11.431 11.879 12.963 15.005 To calculate the density for the objects measured, you are going to conduct a linear regression analysis using Excel. Linear regression analysis for this experiment is just a fancy way of saying that you are going to plot the data points as a scatter plot on a 2D graph, and determine if you can draw a straight line that connects them together. Procedure a) Open a new spreadsheet in Excel. The cells in the spreadsheet are organized vertically by lettered columns and horizontally by numbered rows. b) In the spreadsheet, type (beginning at cell A1) in all of the information that is provided above in Table 01, including the header information for each column. When completed, your Excel data should look exactly like Table 01, with mass data under Y, and volume data under X. c) Also, in cell D1, type in the words Density Data. d) Now that you have your data, what can you do with it? What you have created is a 2D coordinate system. Each volume-mass pair represents a point in 2D space, so now you are going to create a graph for these data points. e) Click here for a video tutorial on how to create an XY Scatterplot in Excel. f) Once you have completed your graph, save your Excel file and complete the related questions in the lab report.
Transcribed Image Text:The density values for the two materials are: Gold: 19.3 g/cm³ Pyrite: 4.8 g/cm³ To conduct the experiment, you collect 7 different sized pieces and weigh each piece. You also determine the volume of each piece using a displacement method that will be discussed in Lab 01. Briefly, this method involves taking a known amount of water, plunging an object in the water and observing the differential volume of the object (i.e. the displaced volume). After measuring the volume in mL, you can convert those values to cm³, using the conversion factor 1 mL = 1 cm³. After completing your measurements, you have collected the following data: Table 01. Mass vs. Volume Data for Exercise 01. Y Mass (g) 6.210 7.243 X Vol (cm³) 1.26 1.51 2.00 2.37 2.48 2.68 3.10 9.778 11.431 11.879 12.963 15.005 To calculate the density for the objects measured, you are going to conduct a linear regression analysis using Excel. Linear regression analysis for this experiment is just a fancy way of saying that you are going to plot the data points as a scatter plot on a 2D graph, and determine if you can draw a straight line that connects them together. Procedure a) Open a new spreadsheet in Excel. The cells in the spreadsheet are organized vertically by lettered columns and horizontally by numbered rows. b) In the spreadsheet, type (beginning at cell A1) in all of the information that is provided above in Table 01, including the header information for each column. When completed, your Excel data should look exactly like Table 01, with mass data under Y, and volume data under X. c) Also, in cell D1, type in the words Density Data. d) Now that you have your data, what can you do with it? What you have created is a 2D coordinate system. Each volume-mass pair represents a point in 2D space, so now you are going to create a graph for these data points. e) Click here for a video tutorial on how to create an XY Scatterplot in Excel. f) Once you have completed your graph, save your Excel file and complete the related questions in the lab report.
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