Molar Mass Lab - Stephanie Pham Molar Mass Lab IB Chemistry...

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Stephanie Pham Molar Mass Lab IB Chemistry SL R. W. Johnson High School February 22, 2010 Candidate ID Number: 003342-005 Design- Instructor Directions: Lab gas is natural gas and so is composed of (mostly) methane, CH 4 . Your task today is to determine the M r of this compound. Research Question: What is the molar mass of lab gas? Purpose: The aim of this experiment is to calculate the molar mass of lab gas, which is mostly comprised of methane, or CH 4. Materials and Equipment: 250 mL Pyrex flask Rubber stopper Rubber tubing 500 mL graduated cylinder Acculab Balance thermometer Chemicals: CH 4 (lab gas, methane) H 2 O Safety Notes:
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Goggles were worn for the duration of the lab. Hands were washed after completion of the lab. Method: 1. Obtain a dry empty flask of appropriate size and a stopper that fits it securely. 2. Weigh the flask + stopper using the more accurate balance. 3. Fill the flask with lab gas by taking a piece of rubber tubing and attaching it to the gas tap. 4. Place the end of the tubing as far into the inverted flask as possible. 5. Turn on the gas and slowly remove the tubing. 6. Place the stopper back on the flask. Reweigh the flask. 7. Determine the exact volume of the flask by filling it with water and slowly replacing the stopper. 8.
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Molar Mass Lab - Stephanie Pham Molar Mass Lab IB Chemistry...

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