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Analysis of Results and Other Questions Densities (in g/cm at 25°C) 6. Assuming your nails are made of one of the elemental metals in the table (right), what is the most likely Mg 1.74 metal? How confident are you that they are made up of that metal? Explain. Zn 7,14 Cr 7.15 Sn 7.26 Fe 7.87 Ni 8.90 Cu 8.96 Pb 11.3 Au 19.3 7. (a) Search the web for a value for the density of baby oil (if no T is given, it is assumed to be near room T): Source company or site name where you got the value (don't list the full URL): (b) Search the web (Google is best here) for the density of mineral oil from Sigma-Aldrich (a chemical company): (c) As you learned during your prelab (hopefully!), baby oil and mineral oil are not pure substances. As such, their composition (and thus density) can vary a bit, which would not be so for a pure substance (at a given T). That is why you likely found varying values-or ranges of values-for baby oil. That said, assuming that the value you got from the Sigma-Aldrich web site for the density of mineral oil is the best guess for the "actual value" of the density of the baby oil you used in this experiment, answer the following: Which method, the one with the pycnometer (Method A) or the one with the graduated cylinder (Method B) resulted in the more accurate determination of the density of baby oil? Give reasoning. (d) Given your data, can you state which method (A or B) determines density more precisely? If yes, provide reasoning. If not, what would you need to do experimentally in order to tell? Explain.

Analysis of Results and Other Questions Densities (in g/cm at 25°C) 6. Assuming your nails are made of one of the elemental metals in the table (right), what is the most likely Mg 1.74 metal? How confident are you that they are made up of that metal? Explain. Zn 7,14 Cr 7.15 Sn 7.26 Fe 7.87 Ni 8.90 Cu 8.96 Pb 11.3 Au 19.3 7. (a) Search the web for a value for the density of baby oil (if no T is given, it is assumed to be near room T): Source company or site name where you got the value (don't list the full URL): (b) Search the web (Google is best here) for the density of mineral oil from Sigma-Aldrich (a chemical company): (c) As you learned during your prelab (hopefully!), baby oil and mineral oil are not pure substances. As such, their composition (and thus density) can vary a bit, which would not be so for a pure substance (at a given T). That is why you likely found varying values-or ranges of values-for baby oil. That said, assuming that the value you got from the Sigma-Aldrich web site for the density of mineral oil is the best guess for the "actual value" of the density of the baby oil you used in this experiment, answer the following: Which method, the one with the pycnometer (Method A) or the one with the graduated cylinder (Method B) resulted in the more accurate determination of the density of baby oil? Give reasoning. (d) Given your data, can you state which method (A or B) determines density more precisely? If yes, provide reasoning. If not, what would you need to do experimentally in order to tell? Explain.

Chemistry: Principles and Reactions
Chemistry: Principles and Reactions
8th Edition
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:William L. Masterton, Cecile N. Hurley
Chapter2: Atoms, Molecules, And Ions
Section: Chapter Questions
Problem 90QAP: Calculate the average density of a single Al-27 atom by assuming that it is a sphere with a radius...
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Raw Data: Mass of 50-mL conical tube & cap: 13.58 (1) Water Mass of tube, cap and water: f6.45 (2) Mass of 50-mL conical tube & cap: 13.71 (3) Nails Mass of tube, cap, & nails: 48.02 (4) Mass of tube, cap, nails, & water: 82.01 (5) Your liquid/fluid Dish Mass of 50-mL conical tube & cap: 13.73 (6) Scap Mass of tube, cap, & your liquid/fluid: 108.1 (7) Mass of 50-mL conical tube & cap: 13.65 (8) Baby Oil Mass of tube, cap, & baby oil: 61.05 (9) Mass of 50-mL graduated cylinder: 28.23 (10) Mass of 50-mL graduated cylinder with baby oil in it: 67.50 g(1) Volume reading of 50-mL graduated cylinder with baby oil in it: 48.8 mL Temperature in the room OR temperature of the water (to nearest degree): 28 °C sumed Information: Density of water at the temperature in the room (see table above);
Transcribed Image Text:Raw Data: Mass of 50-mL conical tube & cap: 13.58 (1) Water Mass of tube, cap and water: f6.45 (2) Mass of 50-mL conical tube & cap: 13.71 (3) Nails Mass of tube, cap, & nails: 48.02 (4) Mass of tube, cap, nails, & water: 82.01 (5) Your liquid/fluid Dish Mass of 50-mL conical tube & cap: 13.73 (6) Scap Mass of tube, cap, & your liquid/fluid: 108.1 (7) Mass of 50-mL conical tube & cap: 13.65 (8) Baby Oil Mass of tube, cap, & baby oil: 61.05 (9) Mass of 50-mL graduated cylinder: 28.23 (10) Mass of 50-mL graduated cylinder with baby oil in it: 67.50 g(1) Volume reading of 50-mL graduated cylinder with baby oil in it: 48.8 mL Temperature in the room OR temperature of the water (to nearest degree): 28 °C sumed Information: Density of water at the temperature in the room (see table above);
n lo Report Form, Density of Nails, Baby Oll, ana MOPE Analysis of Results and Other Questions Densities (in g/cm at 25°C) 6. Assuming your nails are made of one of the elemental metals in the table (right), what is the most likely Mg 1.74 metal? How confident are you that they are made up of that metal? Explain. Zn 7.14 Cr 7.15 Sn 7.26 niloded lo sl Fe 7.87 Ni 8.90 8.96 Pb 11.3 Au 19.3 o dee 7. (a) Search the web for a value for the density of baby oil (if no T is given, it is assumed to be near room T): Source company or site name where you got the value (don't list the full URL): (b) Search the web (Google is best here) for the density of mineral oil from Sigma-Aldrich (a chemical company): (c) As you learned during your prelab (hopefully!), baby oil and mineral oil are not pure substances. As such, their composition (and thus density) can vary a bit, which would not be so for a pure substance (at a given T). That is why you likely found varying values-or ranges of values-for baby oil. That said, assuming that the value you got from the Sigma-Aldrich web site for the density of mineral oil is the best guess for the "actual value" of the density of the baby oil you used in this experiment, answer the following: Which method, the one with the pycnometer (Method A) or the one with the graduated cylinder (Method B) resulted in the more accurate determination of the density of baby oil? Give reasoning. (d) Given your data, can you state which method (A or B) determines density more precisely? If yes, provide reasoning. If not, what would you need to do experimentally in order to tell? Explain.
Transcribed Image Text:n lo Report Form, Density of Nails, Baby Oll, ana MOPE Analysis of Results and Other Questions Densities (in g/cm at 25°C) 6. Assuming your nails are made of one of the elemental metals in the table (right), what is the most likely Mg 1.74 metal? How confident are you that they are made up of that metal? Explain. Zn 7.14 Cr 7.15 Sn 7.26 niloded lo sl Fe 7.87 Ni 8.90 8.96 Pb 11.3 Au 19.3 o dee 7. (a) Search the web for a value for the density of baby oil (if no T is given, it is assumed to be near room T): Source company or site name where you got the value (don't list the full URL): (b) Search the web (Google is best here) for the density of mineral oil from Sigma-Aldrich (a chemical company): (c) As you learned during your prelab (hopefully!), baby oil and mineral oil are not pure substances. As such, their composition (and thus density) can vary a bit, which would not be so for a pure substance (at a given T). That is why you likely found varying values-or ranges of values-for baby oil. That said, assuming that the value you got from the Sigma-Aldrich web site for the density of mineral oil is the best guess for the "actual value" of the density of the baby oil you used in this experiment, answer the following: Which method, the one with the pycnometer (Method A) or the one with the graduated cylinder (Method B) resulted in the more accurate determination of the density of baby oil? Give reasoning. (d) Given your data, can you state which method (A or B) determines density more precisely? If yes, provide reasoning. If not, what would you need to do experimentally in order to tell? Explain.
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