What was the initial volume of the balloon? ?= L 9. If 86.5 mol of an ideal gas is at 3.73 atm and 309 K, what is the volume of the gas? volume: L 10. If an ideal gas has a pressure of 7.49 atm, a temperature of 443 K, and a volume of 97.37 L, how many moles of gas are in the sample? ?= mol 11. What pressure is exerted by 949.9 g of CH4 in a 0.550 L steel container at 174.7 K? ?= atm 12. How many moles of N2 are in a 2.90 L cylinder at 77.3 °C and 9.45 atm ? moles of N2: 13. What volume is occupied by 0.309 mol of CO2 at 281.6 K and 719 mmHg? ?= L 14. What pressure is exerted by 0.140 mol N2 in a 5.87 L steel container at 84.5 °C? ?= atm 15. How many grams of Kr are in a 3.51 L cylinder at 44.8 ?C and 4.55 atm? mass: g 16. If 2.94 g Ar are added to 2.43 atm He in a 2.00 L cylinder at 27.0 °C, what is the total pressure of the resulting gaseous mixture? ?total= atm 17. A mixture of He, Ne, and Ar has a pressure of 11.0 atm at 28.0 °C. If the partial pressure of He is 3.59 atm and the partial pressure of Ar is 2.47 atm, what is the partial pressure of Ne? ?Ne= atm 18. A sample of nitrogen gas was collected via water displacement. Since the nitrogen was collected via water displacement, the sample is saturated with water vapor. If the total pressure of the mixture at 21 °C is 1.34 atm, what is the partial pressure of nitrogen? The vapor pressure of water at 21 °C is 18.7 mm Hg. atm 19. In the reaction, 2HgO(s)?2Hg(s)+O2(g) what mass of mercury(II) oxide, HgO, would be required to produce 981 L of oxygen, O2, measured at STP? mass: g 20. In the reaction, 2HgO(s)?2Hg(s)+O2(g) how many liters of oxygen, O2, measured at STP, would be produced from the decomposition of 145 g of mercury(II) oxide, HgO? O2 produced: L 21. When aluminum reacts with concentrated hydrochloric acid, hydrogen gas is produced. 2Al(s)+6HCl(aq)?2AlCl3(aq)+3H2(g) What mass of Al(s) is required to produce 723.0 mL of H2(g) at STP? mass: g Al
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