Answer Happy

Experiment 7: Determining the Molar Mass of a Gas Data Sheet Instructions: Fill in the data sheet answer the questions and show your calculation. Include the aim and write a conclusion. Write your name, section, ID and group. g/cm 1 g/cm3 1) Mass of flask filled with air (m1) = Given 2) Mass of flask filled with gas (m2) = Given 3) Mass of flask filled with water (m3) = Given 4) Room temperature (K) = Temp (°C) Given + 273 = K 5) Atmospheric pressure = 760 mmHg = 1 atm 6) Density of air under experimental conditions = 7) Mass of water = (m3) - (m1) = 8 8) Density of water - 9) Volume of water = m20/d 20 = step 7 / step 8 10) V. H20 - V. task = V=V. 11) Mass of air (mada XV. ar- step 6 x step 10 = 12) Mass of empty flask - m - m - step 1 - step 11 = 13) Mass of gas = m - m = step 2 - step 12 = В 14) Molar mass of a gas = m. saxRxT/Px V =- g/mol 15) The gas is 16) The theoretical molar mass of the gas calculated from the periodic table cm cm 8 00 8 17) % Error Experimental MM-Theoretical MM) Theoretical MM x 100 96

Questions (Write the answer in your own words): Q1) Is there a possibility to get an experimental molar mass for the gas higher than the theoretical molar mass of the gas calculated from the periodic table? Explain why. Hint: Think of the experimental errors. Ans1) Q2) When do gases follow the ideal gas law? Hinto check the manual Ans2)

Group.3 1- Mass of flask filled with air . m 35.5610 g 2- Mass of flask filled with gas . m2 3- Mass of flask filled with water. m 35.6210 g 142.4530 g 4- Room temperature = 21°C K 5 - Atmospheric pressure = 760 mmHg 5 1 atm 6- Density of air under conditions of experiment 0.00122 g/cm 3