Question

Exam 2 W19 The first container is hed with Ar, the secoed with Oh and the third with CO The pressure and tener fure of the three gnses are the same. Which of the following is true of A the mumber of moles of gas in the containers are the same 24 Three esntainers of equal voluse are hlled with three different gases Oi P, V. T same four all the masses of gas in the three containers is the same C the density of gas in the three containers is the same D A, B, and C are all true E mone of these are true B. 25. If equal masses of O, and N, are placed in identical containers at the same temperature, which of the foillowing statements is true? (N-14.0 gmol; O-160 gmol) O, mass, V, T N same for bot A. Both flasks contain the same number of molecules. he pnressure in the flask that contains N, will be greater than the pressure in the flask that There will be more molecules in the fRask that contains O, than the flask that contains N contains O D. This question can't be answered unless we know the actual weights of O, and Na in the flasks. None of these are correct. E. 26. Which sample would have the largest volume at 25 C and 750 mmHg? A. 100 g CH4 B. 100 g Co2 C. 100 g NO D. 100 g SO2 E. All of these samples would have the same volume at 25°C and 750 mmHg. gas mixture with a total pressure of 950 torr has partial pressures of 220 torr N., 250 torr Ar, and 480 torr SF What is the mole fraction of SF, in the mixture? P-950 torr PN2 220 torr B. 0.37 C. 0.50 D. 0.51 N2 Ar SF。 -250 torr PsFe 480 torr 28. A balloon contains 0.76 mol Na, 0.18 mol Os 0.031 mol He and 0.026 ol H. The total pressure in the balloon is 749 mm Hg. What is the partial pressure of O2? A. 20 mm Hg В. 23 mm Hg C. 140 mm Hg D. 570 mm Hg 29. Two identical flasks are at the same temperature. One is filled with 2 grams of hydrogen gas (H-), the other with 28 grams of nitrogen gas (N-). Which property would be different for the two samples? A. pressure B. average kinetic energy C. density D. the number of molecules in each container E. none of the above would be different H2 N2 V, T same both

Answer 1

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