Question

. A fluoride of phosphorus in the gaseous state was

found to diffuse more slowly by a factor of 2.12

than nitrogen under the same conditions. If it

contains only one phosphorus atom, and no. of F

atom is..........
PLZZ guys answer fast..
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Answer 1

Answer:

According to Graham's law:

Rate 1Rate 2=M2M1−−−√Rate N2Rate of PFx=MPFxMN2−−−−√2.12 rr=MPFx28 g−−−−√MPFx =125.84 g

The molecular mass is 125.84 g

The molecule contains one P atom so 30 g is contributed by P and rest is by Fl. Fl has molecular mass 19 g and P has 30 g.

So the molecule has one P atom and 5 Fl atoms. Molecular formula is PF5.

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