A fluoride of phosphorus in the gaseous state was found to diffuse more slowly by a factor of 2.12 than nitorgen under the same conditions. Calculate the molecular weight of this fluoirde. If it contains only one phosphorus atom, write its molecular formula.

Explanation

To solve the problem step by step, we will use Graham's law of diffusion, which relates the rates of diffusion of two gases to their molar masses.

### Step 1: Understand the problem
We know that a fluoride of phosphorus diffuses more slowly than nitrogen by a factor of 2.12. We need to find the molecular weight of this fluoride and its molecular formula, given that it contains only one phosphorus atom.

### Step 2: Write down Graham's law of diffusion
According to Graham's law:
\[
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