1. Sulfur and fluorine form several different compounds including sulfur hexaflu
ID: 1047029 • Letter: 1
Question
1. Sulfur and fluorine form several different compounds including sulfur hexafluoride and sulfur tetrafluoride. Decomposition of a sample of sulfur hexafluoride produces 0.327 g of fluorine and 91.91 mg of sulfur, while decomposition of a sample of sulfur tetrafluoride produces 20.378 g of fluorine and 8.602 g of sulfur. Calculate the mass of fluorine per gram of sulfur for each sample and show that these results are consistent with the law of multiple proportions. 2. A7.14 g sample of a compound containing only carbon, hydrogen, nitrogen, oxygen, and sulfur is burned in the presence of oxygen and yields 2.26 g of HNO3. A separate 2.43 g sample of this same compound is combusted and yields 0.782 g of S02. A third sample, weighing 3.78 g, combusts and yields 6.68 g of CO2 and 1.54 g of H20. What is the empirical formula of this compound?Explanation / Answer
Ans 1 :
In sulfur hexafluoride :
the mass fluorine : mass of sulfur = 327 : 91.91
= 7 : 2
In sulfur tetrafluoride :
ratio of mass of F : Mass of S = 20.378 : 8.602
= 7 : 3
In both the compounds , the ratio is simple whole number ratio , so this validates the law of multiple proportion.
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