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PURPOSE In this particular laboratory experiment we are going to determine the molar mass of an unknown gas from the gas density We are also going to use gas density along with the kinetic molecular theory to explain the behavior of gas filled balloons Finally we are going to demonstrate the effects of temperature and pressure changes of gassesPROCEDURE We are using the experimental procedure as described in our laboratory manualUniversity of Wisconsin - River FallsLaboratory ManualChemistry 116Experiment 116-8Molar Mass From Gas DensitiesPages 81 82There are no changes to this laboratory or from the indicated laboratory procedureMATERIALS and APPARATUS Part A-1 In this part of the experiment we are going to observe three balloons filled each with one of three different gasses So as part of our materials we need to have three balloons as well as the three gasses These balloons were already prepared for us and we kept underneath the fume hood for observationHeliumSulfur ExofluorideHeSF64002602 g14606 gLaboratory StockLaboratory StockAmmoniaNH317031 gLaboratory StockPart A-2-5cDuring this part of the experiment our materials and equipment consisted of one clean dry 500mL plastic bottle with an airtight cover Along with the bottle we need an electronic balance a thermometer set up to measure the air temperature as well as a barometer with a chart on how to interpret the readings Finally we must have the six different gasses with which to do our experimentDistilled WaterHeliumH2OHe3300674 g4002602 gLaboratory StockLaboratory StockOxygenArgonO2Ar319988 g39948 gLaboratory StockLaboratory StockCarbon DioxidePropaneCO2CH3CH2CH3440098 g4409652 gLaboratory StockLaboratory StockNatural GasCH41604276 gLaboratory StockPart A-6In this particular part of the experiment we made two different balloons Therefore we need the balloons themselves as well as the two different gasses that are going to go into the balloons One of the balloons needed to be filled with Helium and then the other one with Carbon Dioxide Then the balloons were to be taken back to our place of residence for observationHeliumCarbon DioxideHeCO24002602 g440098 gLaboratory StockLaboratory StockPart B-1For this part of the
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