the volume 8f the taline contalhér. negligible compared to 68. What is the parti
ID: 1046838 • Letter: T
Question
the volume 8f the taline contalhér. negligible compared to 68. What is the partial pressure of nitrogen in a container that coti 3.96 mol of oxygen, 7.49 mol of nitrogen, and 1.19 mol of dioxide when the total pressure is 563 mmHa? A) 53.0 mmHg B) 819 mmHg 69. Which of the following gases will have the slowest rate of effusion at constant temperature? A) H2 70. The molar mass of an unknown gas was measured by an effusion experiment. It was found that it took 63 s for the gas to effuse, whereas nitrogen gas required 48 s. The molar mass of the gas is A) 24 g/mol. From th heat th A) ga that contains at B) los C) D) E) E) 563 mmHg Vnk C) 176 mmHg D) 334 mmHg B) F2 C) Ne D) SO3 E) CF 76 E) 48 g/mol C) 16 g/mol. D) 32 g/mol. B) 37 g/mol. 71. If 250 m the time required for the same volume of helium to pass through the hole under the same conditions will be A) 56 s.B)7 s. L of methane, CHs, effuses through a small hole in 28 s, C) 1.8 s. D) 14 s. E) 112 s. 72. At constant pressure, the sign of q for the process CO2(q) is expected to beExplanation / Answer
68)
mol of N2 = 7.49 mol
total mol of gas = 3.96 mol + 7.49 mol + 1.19 mol
= 12.64 mol
mole fraction of N2,
X(N2) = mol of N2 / total number of mol
= 7.49/12.64
= 0.5926
partial pressure of N2 = total pressure * mole fraction of N2
= 563 mm Hg * 0.5926
= 334 mm Hg
Answer: D
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