Lab 3 quiz - chemistry lab 3 molar mass of volatile liquid PDF

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chemistry lab 3 molar mass of volatile liquid...

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CHEM1300 Lab Quiz 3 1. What is purpose of today’s lab? The purpose of the lab is to measure the physical properties of pressure, volume, and temperature for a gaseous substance. Also to determine the molar mass of a volatile liquid

2. What is the best way to determine the mass of a gas, if the sample of a gas has a given volume at certain temperature and pressure? The best way is to use the ideal gas law

3. Calculate the molar mass of an unknown gas sample contained in a 1.5 L flask that has a mass of 0.50g at temperature 25oC and pressure 790 mmHg. R= 0.08206 atm.L/mol.K P(v)=(n)(R)(T)

0.063731 mol

4. From Previous lab: A 1.652 g of sample of a hydrate salt, CaSO4, is heated at a temperature greater than 170OC in a test tube until a constant mass is reached. The mass of the anhydrous CaSO4 salt is 1.272 g. Calculate the percent by mass of water in the hydrate calcium sulfate salt. (1.652-1.272)/1.652*100=23.0

5. What is the chemical name of Fe(OH)3 ? Iron (III) oxide hydroxide...