How many grams of fluorine are needed to produce 120. g of phosphorus trifluoride if the reaction has a 78.1% yield from the following reaction: P4+6F2 -> 4PF3

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  1. Here is a worked example of a stoichiometry problem. Just follow the steps.
    You need to start with 120/0.781 = ?g to end up with 120 g at 78.1% yield.

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