What is the mass of 25.0 grams of hf

1.25 moles of HF

Explanation:

1 mole = 20.0 grams of HF

So, to calculate mass of 25.0 grams

                                       =25.0*1/20.0

                                       =1.25 moles

there are no statements provided but here is why:

sulfur belongs to group 16 because it can be found in nature whether it is in a free or combined state.

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tracks, burrows, eggshells, nests, tooth marks, or gastroliths