Can someone help me to answer this correctly, please, and explain it. Please answer these 3 short questions, I don't have more money to buy more questions. These 3 questions are different.

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In the laboratory you dissolve 24.1g of potassium acetate in a volumetric flask and add water to a total volume of 500.mL What is the molarity of the solution? M You need to make an aqueous solution of 0.232M calcium iodide for an experiment in lab, using a 250mL volumetric flask. How much solid calcium iodide should you add? grams How many grams of barium hydroxide, Ba(OH)2, must be dissolved to prepare 250.mL of a 0.215M aqueous solution of the salt? g