: If some solid sticks to the side of the test tube and doesn't dissolve, the calculated molar mass will be too low because the actual concentration is lower than assumed.
) : The difference between the freezing point of pure cyclohexane (approx. 6.5∘C6.5 raised to the composed with power C ) and the solution. : For cyclohexane, this is typically Critical Calculations : Molality ( ) : Calculated as Moles of Solute : Found using
: To measure the effect of a solute on the freezing point of a solvent (usually cyclohexane) and calculate the molar mass of an unknown solid. Core Data Points : Mass of Solvent : Often around 8–10g of cyclohexane. Freezing Point Change ( ΔTfcap delta cap T sub f socnyi_ves_i_arxangel_operedit_samopal_prod
Reports often discuss potential errors that affect the final reported molar mass:
Based on educational resources from platforms like Studocu and CliffsNotes , a complete report generally includes: : If some solid sticks to the side
: If the same mis-calibrated thermometer is used for both pure solvent and solution, the final result is often unaffected because the error cancels out in the ΔTcap delta cap T calculation.
: If cyclohexane evaporates, the freezing point may be recorded as too high, leading to an incorrect molar mass calculation. : For cyclohexane, this is typically Critical Calculations
While there are no official "solid reports" matching that specific string (which appears to be a unique identifier or a snippet from a niche file name), it strongly correlates with university-level chemistry lab reports for . This experiment typically focuses on determining the molar mass of an unknown nonvolatile solute through freezing point depression. Key Components of the Lab Report
@article{wang2021mlfw,
title={MLFW: A Database for Face Recognition on Masked Faces},
author={Wang, Chengrui and Fang, Han and Zhong, Yaoyao and Deng, Weihong},
journal={arXiv preprint arXiv:2109.05804},
year={2021}
}
This database is publicly available. We provide: 1) the original images(250x250), 2) the aligned images(112x112) and 3) the pair list. Baidu Netdisk(code:328y) , Google Drive
Now, we provide a list to indicate the masked faces. Google Drive