18. A 2.42 gram sample of NCls was placed into an evacuated 2.00-L flask and allowed...
18. A 2.42 gram sample of NC15 was placed into an evacuated 2.00-L flask and allowed to partially decompose at 250.°C according to the following equation: NCls (g) NC13 (g) + Cl2 (g) The total pressure in the flask after partial decomposition was 359 torr. Calculate the mole fraction of NC13 in the flask A 0.500 B. 0.473 C. 0.540 0. 0.0540
30. A 5.71 gram sample of PCi5 is placed in an evacuated 1.8 liter flask at 264°C and decomposes to phosphorus trichloride and chlorine gas. (a) Write the balanced equation for the decomposition reaction of PCi5. (b) Calculate the initial pressure in the flask before the PC15 decomposed, (c) If 75% of the PC15 decomposes, calculate the partial pressures of all three gases in the flask after the reaction is completed.