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Topic: XFn + S ---> SF6 Find X and n, the rest of the data inside  (Read 1950 times)

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Offline shanthan

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XFn + S ---> SF6 Find X and n, the rest of the data inside
« on: October 02, 2009, 01:27:32 AM »
I am first going to write the question...

An unknown binary compound containing fluorine(XFn) has a density as a gas that is 1.777 times that of argon at the same condition. When 3.650 * 10-2 mol of this compund reacts with excess sulfur, 2.666 g of SF6 is poduced. Find the value n in XFn and identify element X.

MM/g mol-1 SF6= 146.06 S= 32.07 F= 19.00 Ar = 39.95

that was the question.. this is what i found..

MM of XFn= 70.7115

g of XFn added= 2.5912

XFn+ S = SF6

The rest all i am confused.. please help guys.. please..
« Last Edit: October 02, 2009, 03:36:33 AM by Borek »

Offline Borek

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Re: XFn + S ---> SF6 Find X and n, the rest of the data inside
« Reply #1 on: October 02, 2009, 03:37:57 AM »
Density should allow you to calculate molar mass. SF6 will tell you how many moles of fluorine are present in the sample.
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