QUESTION 10 A gas mixture composed of He and Xe is maintained at STP. If the mixture containys 0.73 atm of He, what is the partial pressure of Xe in the unit
atmospheres?
Report your answer with two decimal places. If done correctly you shouldn't have to round.

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Ch4 and ph3 are both covalent since they are composed both of non-metals.    ch4 is non- polar because of  london forces and has a geometry of tetrahedral  ph3 , on the other hand, is umbrella shaped polar and has dipole-dipole intermolecular force (imf) . since ph3 is polar, it has a stronger imf   

The answer to your q the total mass is 73