THERMODYNAMICS (with solutions)

6. A 20.0-L tank contains 0486 g of helium at 18 deg C. The molar mass of helium is 4.00 gfmol. How many moles of helium are in the tank? (10 Points) Enter your math answer 7. A 20.0-L tank contains 0486 g of helium at 18 deg C. The molar mass of helium is 4.00 g/mol. What is the pressure in the tank in torr? (10 Points) Enter your math answer 14. One mol of a gaseous mixture has the following gravimetric analysis: 02 = 16%, 002 = 44%, N2 = 40%. The pressure of mixture is 30 psia. Find partial pressure of 002 in psia. (10 Points) Enter your math answer 15. A 10 W3 tank contains gas at a pressure of 500 psia, temperature of 85F and a weight of 25 pounds. A part of the gas was discharged. and the temperature and pressure changed to 70F and 300 psia, respectively. Heat was applied and the temperature was back to 35F. Find the volume in ft't3. (10 Points) Enter your math answer :' 5'.\"- 10:1122 (55%\"- 6 FME4-M: PROBLEM SEI' 07 (F... E 12. A 10 ft"3 tank contains gas at a pressure of 500 psia. temperature of 85F and a weight of 25 pounds. A part of the gas was discharged, and the temperature and pressure changed to 70F and 300 psia. respectively. Heat was applied and the temperature was back to 85F. Find the pressure of the gas in psia. (10 Points) | Enter your math answer | 13. A 10 ft"3 tank contains gas at a pressure of 500 psia. temperature of 85F and a weight of 25 pounds. A part of the gas was discharged, and the temperature and pressure changed to 70F and 300 psia, respectively. Heat was applied and the temperature was back to 85F. Find the nal mass in lb. (10 Points) Enter your math answer III II) o