It would work, although as Jon mentions, it would be strictly for bittering. All of the flavor/aroma oils are in the petals. Might be useful to reduce wort loss in high IBU beers.
You could calculate the adds by multiplying the recipe AA% times the number of ounces. You would need a scale that can measure to a tenth of a gram. Ex. 1 oz of 8% AA = 2.24 gm.
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