Partial Pressure of Kr in a N2/Kr Mixture (0.505 atm)

[parwana]

A mixture of 5.40 g of N2 and 10.2 g of Kr exerts a pressure of 0.505 atm.
What is the partial pressure, in atm, of Kr?

 

[Gokul43201]

parwana, please show what you've tried, when you need help with a problem.

 

[parwana]

I just don't get the problem at all, i mean does this mean volume and temperature are constant and if so do i make up any numbers for the temp and volume and substitute in the equation pv=nrt??

pleASE help

 

[parwana]

i got it, i got the mole fraction of Ke and then times thta by total pressure.

 

[Gokul43201]

i got it, i got the mole fraction of Ke and then times thta by total pressure.

If you meant "Kr", then yes, that's correct. With any such problem, you want to start from the definitions. In this case, the definition of 'partial pressure' is all you need.