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Answer the following questions showing all work.
1. What is the mass of Potassium fluoride do you need to add to get 250.mL of 0.432M Potassium fluoride solution?
2. What is the mass of Aluminum oxide do you need to add to get 125.mL of 0.761M Aluminum solution?
3. What is the mass of Magnesium sulfate (also called Epsom salt) do you need to add to get 325.mL of 1.05M Magnesium sulfate solution?