What minimum mass of succimer (in {rm mg}) is needed to bind all of the lead in a patient’s bloodstream?

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What minimum mass of succimer (in {rm mg}) is needed to bind all of the lead in a patient’s bloodstream? Assume that patient blood lead levels are 40 mu g/dL, that total blood volume is 5.0 L, and that one mole of succimer binds one mole of lead