Homework Help: Chemistry

Posted by L on Tuesday, October 20, 2009 at 4:54pm.

Elemental sulfur occurs as octatomic molecules, S8. What mass of fluorine gas is needed to react completely with 19.0g of sulfur to form sulfur hexafluoride?

Chemistry - fuzzyyyyy, Tuesday, October 20, 2009 at 5:25pm
first you need a balanced equation, so:
24F2+S8 --> 8SF6

then find the no. of moles of s8 (which is 19g divided by molar mass of s8)

then use the reaction ratio of 24:1 to multiply your answer to get number of moles of fluorine

then convert from moles to mass using m=n*M

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