Chem142_MolarMass_Report_112309

Chem142_MolarMass_Report_112309 - NAME_ Quiz Section_ Lab...

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NAME_________________________________________________ Quiz Section_______ Lab Partner_____________________________________________ 1 CHEM 142 EXPERIMENT #5: MOLAR MASS OF A LOW BOILING LIQUID This report is due at the end of the lab period, before you leave. Use a reasonable number of significant figures, include units with your data, and keep your answers concise. Data (5 pts) Unknown #: ______ Run #1 Run #2 Run #3 Mass of flask + cap + air: -- -- Mass of flask + cap + vapor: Barometric pressure (mmHg and atm) Sample temperature (°C and K) Water (room) temperature (°C and K) Mass of flask + cap + water Density of water at room temperature Calculations and Results 1) Calculate the volume of the gas density flask. Neatly show your work. (2 pts.) Calculation summary : What is the volume of the flask in liters? _________ 2) Calculate the density of air at the temperature and pressure of the laboratory. Assume air is 20.0% O 2 and 80.0% N 2 . Neatly show your work. (3 pts.) Calculation summary : What is the density of air in grams per liter? _________ Lab notebook pages/In-lab points (5 pts)
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This note was uploaded on 02/06/2010 for the course CHEM 142 taught by Professor Iandearing during the Spring '10 term at University of Warsaw.

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Chem142_MolarMass_Report_112309 - NAME_ Quiz Section_ Lab...

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