Question

13. Select the correct statement below regarding H2O and SH2.
a) both molecules are nonpolar b) both molecules are polar
c) H2O is polar, but SH2 is nonpolar d) SH2 is polar, but H2O is nonpolar

15. Select the correct statement
a) a double bond consists of two pi bonds b) a triple bond consists of three pi bonds
c) a single bond consists of one sigma bond d) all statements are correct17. Select the incorrect statement. a) Gases molecules constantly move in continuous, random motion. b) The volume of individual gas molecules in a container is negligible compared to the volume of the container. c) Repulsions and attractions between gas molecules are significant. d) The average kinetic energy of a gas is proportional to the absolute temperature. 18. The kinetic molecular theory of gases predicts pressure to increase as the temperature of a gas increases because: I. the average kinetic energy of the gas molecules increases. II. gas molecules collide more frequently with the container walls. III. there are more molecules per unit volume after raising the temperature. IV. the elasticity of the molecules increases. V. there are less molecules per unit volume after raising the temperature. a) I and II b) I and III c) II and III d) II and V 19. What can you conclude about one mole of two different gases at the same temperature and pressure? a) one mole of two different gases cannot have the same temperature b) one mole of two different gases cannot have the same pressure c) the gas with the most molar mass has the greatest average kinetic energy d) both gases have the same kinetic energy 20. _______ is the passage of gas through a small hole and ____ is the mixing of gas molecules. a) Effusion, Dalton’s law of partial pressures b) Diffusion, Diffraction c) Effusion, Diffusion d) Dalton’s law of partial pressure, mole fraction 21. Select the correct statement a) particles of two different gases always move at the same average speed when they have the same kinetic energy b) N2 has a higher average speed of effusion than H2 c) H2 has a higher average speed of effusion than O2 d) the gas with the most molar mass has the greatest average kinetic energy Copyright ©2019 Grand Canyon University Revised 8/18/19 22. Pressure is created when a) a gas is compressed and the temperature is decreased proportionally b) gas particles collide with the sides of their container c) more gas particles are added and the volume is increased proportionally d) gas particles are removed and the volume stays the same 23. In response to Boyle's law, the pressure of a gas increases as the volume __________ because ________. a) decreases; the gas particles strike the walls of the container more often b) increases; the kinetic energy of the gas particles increases c) decreases; the kinetic energy of the gas particles decreases d) increases; the gas particles strike the walls of the container more often

Answer 1