Chem 111 Test #3

Which of the following is not a gas at 25 degrees C and 1 atm?
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Terms in this set (27)
Which of the following is not a gas at 25 degrees C and 1 atm?
NaCl
A barometer measures a pressure of 745mmHg. What is this pressure in atm?
0.980 atm
A balloon is filled with 3.00L of helium at a pressure of 765 torr. What is the volume of the balloon at an altitude where the pressure in the balloon is 530 torr?
4.33 L
A sample of gas at 4.0 atm and 25.0 mL is heated from 25 degrees C to 40 degrees C. If the pressure remains constant, what is the final volume of the gas?
26.3 mL
In an experiment, 25.0 mL of a gas with a pressure of 1.00 atm is contained in a balloon at 25.0 degrees C. The balloon is then cooled to 5.0 degrees C, and the pressure is found to be 0.750 atm. What is the volume of the gas under the new conditions?
31.1 mL
What is the temperature if 3.0g of propane (C3H8, 44.09g/mol) in a 400.0 mL container exerts a pressure of 5.5 atm?
121 degrees C
What is the molar mass of a gas that has a density of 2.62g/L at 2.00 atm and 25.0 degrees C?
32.0 g/mol
Automobile air bags inflate during a crash or sudden stop by the rapid generation of nitrogen gas from sodium azide. 2 NaN3 (s) > 2 Na (s) +3N2 (g). How many moles of sodium azide are needed are needed to produce enough nitrogen to fill a 50.0L air bag to a pressure of 1.25 atm at 25 degrees C?
1.70 mol
A gas mixture has partial pressures of 120 torr N2, 350 torr Ar, and 480 torr SF6. What is the mole fraction of sulfur hexafluoride in the mixture?
0.51
_______________ is how gases spread among each other, and ________________ is how gases escape through a hole in a container.
Diffusion; effusion
Graph, see test.A gas was found to diffuse twice as slow as helium. Based on molar mass, which of the following was the gas?CH4Which of the following conditions favor ideal gas behavior?low pressure, high temperatureWhich of the following types of electromagnetic radiation have the longest wavelength?radio wavesWhich of the following sources produces the highest energy photons?gamma rays from a starWhat is the wavelength of a photon emitted by a Kr+ laser with an energy of 3.07 x 10^-19 J? c = 3.00 x 10^8 m/s; h = 6.63 x 10^-34 J-sλ = 648 nmDiagram, see test.What l quantum numbers are possible when n = 3?0, 1, and 2What is the orbital designation for an electron with the quantum numbers n = 4, l = 2?4dHow many orbitals exist for the quantum numbers n = 3, l = 1?3Diagram, see test.Which of the following atoms has no unpaired electrons?MgWhat is the ground-state electron configuration of a Cl- ion?1s^2,2s^2,2p^6,3s^2,3p^6Which of the following ions is isoelectronic with P3-?Ca2+Which arrangement is correct for increasing atomic radius (smallest to largest)?Se < Cu < CaList the following ions in order of decreasing size (largest to smallest): O2-, Mg2+, F-O2- > F- > Mg2+Which arrangement is the correct order of increasing first ionization energy (from lowest to highest)?Cs < Na < Li