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Discovery of Sulphuric Acid

112 cm 3 at S...

Question

112 cm³ (at STF) of a gaseous fluoride of phosphorus has a mass of 0.63 g.

Calculate the relative molecular mass of the fluoride. If the molecule of the fluoride contains only one atom of phosphorus, determine the formula of the phosphorus fluoride.

[F = 19; F = 31].

A

8

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B

6

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C

5

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D

4

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E

3

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Solution

The correct option is C
5

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