Lab 5 Write Up - Section AI Lab Partner: EXP 5: MOLAR MASS...

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Section AI Lab Partner: DATA AND CALCULATIONS A. Unknown # 2 Run 1 Run 2 Run 3 Mass of flask + cap + air 52.470 g - - Mass of flask + cap + vapor 52.551 g 52.554 g 52.555 g B. Barometric pressure 729.61 mm Hg = 0.96 atm Sample temperature 100 C = 373 K Water (room) temperature 21.4 C = 294.4 K Mass of flask + cap + water 176.59 g Density of water at RT 1 g/mL Volume of Flask, L 0.12 1. Calculate the volume of the flask.(2 pt) EXP 5: MOLAR MASS OF A LOW BOILING LIQUID Grading WebAssign prelab: 5 pts This template: 30 pts Lab Notebook Duplicate: 5 pts By signing below, you certify that you have not falsified data and that you have not plagiarized any part of this lab report. Failure to sign this declaration will cost you 5 points. Signature: Purpose and Method Things to think about: What is the goal of this experiment? Explain how it is accomplished. What is the general method (not step by step detailed procedure) that you will be using to achieve this goal? How will you process the data that you record in lab? (What calculations will you use and how do you obtain all of the values to plug into those equations?) (5 points) The procedure for this experiment was broken down into 7 steps. The first step was to weigh the flask. This step would later allow us to make calculations regarding the volume of the flask, which would then help us in finding the number of moles of the unknown. The second step was to set up the apparatus and the third step was to vaporize the unknown. This would allow us to
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This lab report was uploaded on 04/07/2008 for the course CHEM 142 taught by Professor Zoller,williamh during the Winter '07 term at University of Washington.

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Lab 5 Write Up - Section AI Lab Partner: EXP 5: MOLAR MASS...

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