How many moles of disulfur decafluoride are present in 1.55*10^22 molecules of this compound?

1 Answer
anor277
Sep 5, 2016

Approx. 0.025*mol

Explanation:

There are 6.022xx10^23 S_2F_10 units in one mole of the stuff by definition.

And thus (1.55xx10^22" molecules")/(6.022xx10^23" molecules mol"^-1) ~= 0.025*mol

S_2F_10 is nasty stuff, though apparently it is quite odourless (this is a "good" property in a war gas, because some punter might get a lethal dose of it before he realizes he has been gassed; the substance has never been deployed in war).

Note that in this problem we could substitute any formula in the equation, and get the molar quantity.

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