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So the relative mass of fluorine in the second compound is one-third that of sf6. what formula expresses one-third the amount of fluorine?
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So the relative mass of fluorine in the second compound is one-third that of sf6. what formula expresses one-third the amount of fluorine?

User Theo Kallioras
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The formula SF_2 expresses one-third the amount of F.

The F:S ratio in the first compound is 6:1.

We want a compound with one third the amount of F, so F:S = 2:1.

The simplest formula with this ratio is SF_2.

User Sussan
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