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a. c. 40. A 2.00 L container holds 0.5 moles of an ideal gas at a pressure of 12.0 atm. What is the gas temperature? 292 K b. 365 K 438 K d. 585 K e. 731 K 41. What is the root-mean-square speed of chlorine gas molecules at a temperature of 346 K? The molar mass of Cl2 is 0.071 kg/mol. a. 110 m/s b 349 m/s 35,000 m/s d. 82,100 m/s e. 120,000 m/s c. c. 42. How much heat energy is required to vaporize a 4.40 g ice cube at 0°C? The heat of fusion for ice is 80.0 cal/g and the heat of vaporization for wate is 540 cal/g and Cwater = 1.00cal/g. °C. a. 2730 cal b. 3170 cal 2820 cal d. 3520 cal e. 2380 cal 43. The volume of an ideal gas changes from 0.40 to 0.51 m and the pressure is kept fixed at 52,000 Pa. What work is done on the system by its environment? a. 5.7 x 103) b. -5.7 x 103] c. -2.1 x 103] d. 2.1 x 103] e. -2.7 x 103
a. 44. A 0.30 kg object is oscillating on a spring (k = 22.0 N/m). Find the potential energy of the system when the object's displacement is 0.035 m, which is exactly half the maximum amplitude. Zero b. 0.027) c. 0.013) d. 0.390 J e. 11.0) 45. A 0.40 kg mass is oscillating on a spring (k = 75.0 N/m). Find the speed of the mass when it's moving through the equilibrium point if the starting displacement from equilibrium was 0.20 m. a. Zero b. 2.7 m/s C. 3.9 m/s d. 4.1 m/s e. 0.55 m/s 46. A musical tone has a frequency of 460 Hz and a wavelength in air of 0.50 m. what is the wave speed? a. 920 m/s b. 270 m/s C. 230 m/s d. 109 m/s e. 115 m/s 47. What is the intensity of a sound with a measured intensity level of 85 dB? a. 1.3 x 10-6 W/m² b. 3.2 x 10-4 W/m² C. 8.5 x 10-6 W/m2 d. 2.0 x 10-3 W/m2 e. 8.5 x 10-3 W/m2