رد: مساااعده بالـ old exam #كيمياء#
اهمـــ سؤالين عندي ـــ:
1- Calculate the root-mean-square speeds (U) of (co2) gas at 0Cْ :
A)493 ms-1 B)461 ms-1 B)633 MS-1 D)393 ms-1
2- Consider the following apparatus. Calculate the partial pressures of helium and neon after the stopcock is open. The temperature remains constant at 16Cْ :
معلومات :
He 1.2L 0.93atm
Ne 3.4L 3.8atm
A) P(He)=0.16 atm : P(Ne)=2.1 atm
B) P(He)=0.243 atm : p(Ne)=2.81 atm
C) P(He)=0.12 atm : P(Ne)=2.5 atm
D) P(He)=0.139 atm : P(Ne)=1.33 atm
|