Topic: XFn + S ---> SF6 Find X and n, the rest of the data inside (Read 2533 times)

shanthan · « **on:** October 02, 2009, 01:27:32 AM »

I am first going to write the question...

An unknown binary compound containing fluorine(XF_n) 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..

Borek · « **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.

Topic: XFn + S ---> SF6 Find X and n, the rest of the data inside (Read 2533 times)

shanthan

XFn + S ---> SF6 Find X and n, the rest of the data inside

Borek

Re: XFn + S ---> SF6 Find X and n, the rest of the data inside

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