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How many milliliters of an aqueous solution of 0.149 M sodium sulfate is needed to obtain...

How many milliliters of an aqueous solution of 0.149 M sodium sulfate is needed to obtain 6.41 grams of the salt?

In the laboratory you dissolve 17.4 g of copper(II) bromide in a volumetric flask and add water to a total volume of 500 . mL. What is the molarity of the solution?

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