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I took a tylenol 3 at 10:30am and its now 10pm can i take nyquil? For my cold.? How many grams of calcium are needed to produce 16 moles of iron ? The equation for the reaction is 2 FeBr3 + 3 Ca -> 3 CaBr2 + 2 Fe? I've got the first line, can't figure out the next step.? How many equivalence point does it has H5I06? What is the solution set of the equation (x+6)(x-m)=0?