Need help with lab calculations
Explain Please
Before Heating:
Mass of empty test tube (g) 18.020
Mass of test tube and mixture before heating (g) 21.510
First Heating:
Mass of test tube and mixture after first heating (g) 21.803
Volume of Water displaced during first heating (mL) 270
Barometric Pressure (mmHg) 722.7
Temperature (C) 22 degrees C
Vapor Pressure of water at this temperature 2.6453
After Second heating
Mass of test tube and mixture after second heating (g) 21.0
Volume of water displaced during second heating (mL) 275
Need Help With Lab Calculations Explain Please Before Heating Mass Of Empty Test Tube G 18 020 Mass Of Test Tube And 1 (80.66 KiB) Viewed 81 times
Need Help With Lab Calculations Explain Please Before Heating Mass Of Empty Test Tube G 18 020 Mass Of Test Tube And 2 (68.56 KiB) Viewed 81 times
Lab Section: Calculations: 13 - Molar volume of a Gas Show your work for Trial One in the space provided below. For BOTH trial one and two create and attach an excel spreadsheet for the following calculations: o Include a completed data sheet AND a second with 'Show Formulas ' active (Click on 'Formulas' tab, select 'Show Formulas' in the "Formula Auditing" subsection. 1. Calculate the mass of oxygen evolved during each heating. 2. Calculate the number of moles of molecular oxygen evolved during each heating. 3. Calculate the partial pressure of the oxygen in the flask using the atmospheric pressure and the water vapor pressure. 4. Calculate the volume of one mole of oxygen under laboratory conditions using a ratio including the volume and number of moles each oxygen sample. 5
Lab Section: 13 - Molar volume of a Gas 5. Adjust the volume of one mole of oxygen under laboratory conditions to standard temperature and pressure (STP) conditions. Be sure to take significant figures into account. 6. Average the results obtained to obtain a "final" value for the experimental molar volume of a gas. 7. The accepted value for 1 mole of a gas at STP is 22.4L. Compare this result with your experimentally determined Molar Volume. Calculate the percent error. 6
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