Because the solution is 500 H 2 O 2 by mass the mass of H 2 O 2 decomposed is

# Because the solution is 500 h 2 o 2 by mass the mass

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that may be present. Because the solution is 50.0% H 2 O 2 by mass, the mass of H 2 O 2 decomposed is 125/2 = 62.5 g. G.6 A 100. L flask contains a mixture of methane (CH 4 ) and argon gases at 25 o C. The mass of argon present is 228 g and the mole fraction of methane in the mixture is 0.650. Calculate the total kinetic energy of the gaseous mixture. G.7 The average lung capacity of a human is 6.0 L. How many moles of air are in your lungs when you are in the following situations? a) At sea level (T=298K, P=1.00 atm) b) 10. M below water (T=298, P=1.97 atm) c) At the top of Mount Everest (T=200. K, P=0.296 atm) Gas Law Problems Key G.8 In the “Methode Champenoise,” grape juice is femented in a wine bottle to produce sparkling wine. The reaction is C 6 H 12 O 6 (aq) 2C 2 H 5 OH(aq) + 2CO 2 (g) Fermentation of 750. mL grape juice (density = 1.0 g/cm 3 ) is allowed to take place in a bottle with a total volume of 825 mL until 12% by volume is ethanol (C 2 H 5 OH). Assuming that the CO 2 is insoluble in H 2 O (actually a wrong assumption), what would be the pressure of CO 2 inside the wine bottle at 25 o C? (The density of ethanol is 0.79 g/cm 3 .) G.9 A compound contains only C, H, and N. It is 58.51% C and 7.37% H by mass. Helium effuses through a porous frit 3.20 times as fast as the compound does. Determine the empirical and molecular formulas of this compound. Gas Law Problems Key #### You've reached the end of your free preview.

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• Spring '08
• Kenney
• Chemistry, Review, Gas Law Problems
• • • 