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ation for Molar mass (Show your work clearly and in detail with units

ation for Molar mass (Show your work clearly and in detail with units

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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Find the molar mass given all this data

**Molar Mass by FPD: Data Sheet** **Unknown Letter:** G **Mass of Unknown Compound:** 0.60 g **Mass of Naphthalene:** 4.330 g --- **Table 1: Time and Temperature for Melting of Naphthalene and the Mixture** | Time | Temp: Naphthalene Run | Temp: Mixture Run | |-------|-----------------------|-------------------| | 0:00 | 95.0°C | 95.0°C | | 0:30 | 89.4°C | 86.8°C | | 1:00 | 81.5°C | 79.7°C | | 1:30 | 79.3°C | 74.4°C | | 2:00 | 79.2°C | 71.1°C | | 2:30 | 79.0°C | 68.9°C | | 3:00 | 78.8°C | 67.6°C | | 3:30 | 78.6°C | 66.5°C | | 4:00 | 78.1°C | 66.3°C | | 4:30 | 77.8°C | 65.3°C | | 5:00 | 77.0°C | 64.0°C | --- **Observations:** - **Freezing Point of Naphthalene** (from graph 1): 80°C - **Freezing Point of Mixture** (from graph 2): 66.5°C - **Change in Freezing Point ΔT:** 80°C - 66.5°C = 13.5°C **Note:** Attach both graphs to the lab report and follow the graphing guidelines in the instructions for clarity in data representation. **Calculation for Molar Mass:** Instructions indicate showing work clearly and in detail with units, ensure this is done in your report.
Transcribed Image Text:**Molar Mass by FPD: Data Sheet** **Unknown Letter:** G **Mass of Unknown Compound:** 0.60 g **Mass of Naphthalene:** 4.330 g --- **Table 1: Time and Temperature for Melting of Naphthalene and the Mixture** | Time | Temp: Naphthalene Run | Temp: Mixture Run | |-------|-----------------------|-------------------| | 0:00 | 95.0°C | 95.0°C | | 0:30 | 89.4°C | 86.8°C | | 1:00 | 81.5°C | 79.7°C | | 1:30 | 79.3°C | 74.4°C | | 2:00 | 79.2°C | 71.1°C | | 2:30 | 79.0°C | 68.9°C | | 3:00 | 78.8°C | 67.6°C | | 3:30 | 78.6°C | 66.5°C | | 4:00 | 78.1°C | 66.3°C | | 4:30 | 77.8°C | 65.3°C | | 5:00 | 77.0°C | 64.0°C | --- **Observations:** - **Freezing Point of Naphthalene** (from graph 1): 80°C - **Freezing Point of Mixture** (from graph 2): 66.5°C - **Change in Freezing Point ΔT:** 80°C - 66.5°C = 13.5°C **Note:** Attach both graphs to the lab report and follow the graphing guidelines in the instructions for clarity in data representation. **Calculation for Molar Mass:** Instructions indicate showing work clearly and in detail with units, ensure this is done in your report.
Expert Solution
Step 1

Given that, 

Mass of naphthalene = 4.530 g = 4.530 × 10-3 kg

 Mass of unknown =  0.60 g

Change in freezing point = 13.5 °C

Kf = 6.90  °C/m

 

 

 

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