What would be the effect on your calculated molecular weight of p-dichlorobenzene if your lab partner left the stopper off of the apparatus while you were weighing the solid p-dichlorobenzene. Explain in detail what would happen if this occurred and how it would affect your result.

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### Effect of Leaving the Stopper Off During Weighing

**Question:**  
What would be the effect on your calculated molecular weight of p-dichlorobenzene if your lab partner left the stopper off of the apparatus while you were weighing the solid p-dichlorobenzene? Explain in detail what would happen if this occurred and how it would affect your result.

**Explanation:**
Leaving the stopper off during the weighing of p-dichlorobenzene can lead to the volatilization of the substance, resulting in a loss of mass. This loss would cause an underestimation of the actual mass of p-dichlorobenzene, leading to errors in the calculation of its molecular weight. The perceived molecular weight would be higher than the true value since the calculations would be based on a lesser amount of substance than originally intended. Accurate weighing is crucial for precise measurement and calculations in experimental procedures.
Transcribed Image Text:### Effect of Leaving the Stopper Off During Weighing **Question:** What would be the effect on your calculated molecular weight of p-dichlorobenzene if your lab partner left the stopper off of the apparatus while you were weighing the solid p-dichlorobenzene? Explain in detail what would happen if this occurred and how it would affect your result. **Explanation:** Leaving the stopper off during the weighing of p-dichlorobenzene can lead to the volatilization of the substance, resulting in a loss of mass. This loss would cause an underestimation of the actual mass of p-dichlorobenzene, leading to errors in the calculation of its molecular weight. The perceived molecular weight would be higher than the true value since the calculations would be based on a lesser amount of substance than originally intended. Accurate weighing is crucial for precise measurement and calculations in experimental procedures.
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