CHEM 1A 22) Zinc reacts with aqueous sulfuric acid to form hydrogen gas: Zn (s) + HSO4 (aq) ZnSO4 (aq) + H (g) FINAL EXAM PRACTICE WORKSHEET In an experiment, 201 ml. of wet Hy is collected over water at 27 C and a barometric pressure of 765 torr. How many grams of Zn have been consumed? The vapor pressure of water at 27 C is 26.74 tom. A) 4.38 x 106 B) 0.519 C) 519 D) 394 E) 3.94 x 105 Answer: B C) 2.37 D) 1800 E) 0.0538 Answer: C if the mixture of Xe, Kr, and Ar has a total pressure of 6.69 atm. What is the mole fraction of Kr if the partial pressures of Xe and Ar are 1.92 atm and 2.75 atm, respectively. A) 0.302 B) 0.287 C) 0.411 1.92 +2.75=4:67 D) 0.259 E) 0.698 Answer: A C) 16.0 D) 106 E) 226 Answer: C 6.69 .302 24) 0.7515 moles of nitrogen gas and 0.1135 moles of methane gas are placed in a 171.6 ml container at 20.8 C. What is the partial pressure (atm) of methane gas? A) 1.14 B) 0.473 . 25) What is the density of carbon dioxide gas (g/L) at 1106.2 mm Hg and 56.3 C? A) 13.9 B) 0.0234