AtmosPressrs07

# AtmosPressrs07 - answer just write the correct algebraic...

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REPORT SHEET Date April 8, 2008 Name Shannon Polson Atmospheric Pressure Partner Justin Include with this report sheet the data sheet and all calculations. Be sure everything is complete. 1. The weather stations give the atmospheric pressure in inches of Hg. What is your measured atmospheric pressure in inches Hg? You may need to consult your textbook for a proper conversion factor. (Show all of your work clearly.) 727.9mm Hg 1m .0254 in 1000 mm 1m 30.12 in Hg 2. Since the pressure could also be a measured physical quantity, as are the volume and temperature, could the Ideal Gas Law be used to solve for the number of moles of a gas? (HINT: Yes!) You need to rearrange the equation to solve for moles in terms of the other variables. (You need not determine a numerical
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Unformatted text preview: answer, just write the correct algebraic equation.) n=PV/RT 3. If the amount of gas (in grams) is known, the molecular weight of a gas can be determined. (Recall how molecular weights are needed for determining molecular formulas knowing empirical formulas.) You have 15 grams of a gaseous unknown substance. If the substance has a volume of 11.2 liters at a pressure of 1 atmosphere and a temperature of 0 O C, determine the molecular weight of this unknown substance. (HINT: You will need the equation from #2 above and the units of molecular weight. Use dimensional analysis!) Try to use correct significant figures. n=?=.5moles (1 atm *11.2 liter )/[.08205(( liter * atm )/(mole* K ))]*(273 K )=.5moles...
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