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LAB---FINDING THE NUMBER OF MOLES OF AIR IN YOUR CLASSROOM USING IDEAL GAS LAW PURPOSE: To use the ideal gas equation in order to find out how many moles of air are in your classroom MATERIALS: calculator, meter stick, metric tape measure, thermometer, barometer PROCEDURE: 1. (YOU MUST SHOW ALL WORK INVOLVED) Measure the atmospheric pressure using the barometer in INCHES OF Hg. Convert this pressure to cm Hg, mm Hg, and atm. Record all of these. 2. Find the air temperature using the thermometer in degrees Celsius. Convert this to Kelvin and record both temperatures. 3. Find the length, width, and height of the classroom in meters. Record all 3 measurements. 4. Calculate the volume of the room in cubic meters, cubic cm, mL, and liters. Record all volumes. DATA TABLE AND CALCULATIONS: Remember to show all work for calculations and round answers to the appropriate sig figs. PRESSURE= __________inches Hg =___________cm Hg = __________mm Hg = __________atm **1 inch = 2.54 cm ** 760 mm Hg = 1 atm TEMPERATURE= ________________C = ________________K LENGTH OF ROOM = ____________________meters WIDTH OF ROOM = ______________________meters HEIGHT OF ROOM = _____________________meters VOLUME OF ROOM = ___________________________cubic meters = _______________________cubic centimeters = _____________________________________mL = ______________________________L CONCLUSIONS: 1. Using the ideal gas equation and your data, calculate the number of moles of air in your classroom. SHOW YOUR WORK TO RECEIVE CREDIT. 2. Find the mass of air in your classroom if the approximate molar mass of air is 29.0 grams/mole. SHOW WORK TO RECEIVE CREDIT.