Atomic Theory Video Lessons

Concept: The Conservation of Matter

# Problem: Part A. There are two different compounds of sulfur and fluorine.In SF6, the mass of fluorine per gram of sulfur is 3.55 g F/g S.In the other compound, SFX, the mass of fluorine per gram of sulfur is 1.18 g F/g S. What is the value of X for the second compound?Express your answer as an integer.Consider two different compounds of carbon and oxygen: carbon dioxide, CO2, and carbon monoxide, CO. The number of oxygen atoms per carbon atom in CO2 is double the number of oxygen atoms per carbon atom in CO. So we can predict that the mass of oxygen per gram of carbon in CO2 is double the mass of oxygen per gram of carbon in CO. And, in fact, if other carbon-oxygen compounds existed, we could predict small, whole-number ratios for the masses of oxygen per gram of carbon in all of them. This is exactly what John Dalton predicted for compounds using his atomic theory of matter. It came to be known as the law of multiple proportions.

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Part A. There are two different compounds of sulfur and fluorine.

In SF6, the mass of fluorine per gram of sulfur is 3.55 g F/g S.

In the other compound, SFX, the mass of fluorine per gram of sulfur is 1.18 g F/g S. What is the value of X for the second compound?