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Chemistry Forums for Students => Undergraduate General Chemistry Forum => Topic started by: jjkwest1 on October 12, 2009, 07:10:37 PM

Title: rate of effusion problem
Post by: jjkwest1 on October 12, 2009, 07:10:37 PM

when 4.28 g of phosphorus was burned in chlorine the product was a phosphorus chloride. Its vapor took 1.77 times as long to effuse as the same amount of CO2 under the same conditions of temperature and pressure. what is the molar mass of the phosphorus chloride?

Would you set the problem up as (x/44)^.5= 1.77   and solve for the molar mass of phosphorus chloride? i'm kind of confused because i dont know if the 4.28 g of phosphorus has anything to do with the compuatation, whether it's useless info or not.

Title: Re: rate of effusion problem
Post by: Borek on October 13, 2009, 03:15:11 AM

You are on the right track, and 4.28 doesn't matter - at least not in question as posted.