6-ROX is a dye with a molecular weight of 631.67 g/mol. A student prepares a stock solution by dissolving 0.275 grams of 6-ROX in 500.0 ml of solvent. The student then prepares a working solution by taking 10.00 ml of the stock solution and diluting it to a final volume of 250.0 ml. Calculate the final concentration of the dye in the working solution in moles per liter.   Answer = ______ moles/liter   Large and small numbers may be entered in calculator notation:  2.30×10–5 can be entered as 2.30E–5

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