I'm working on a review sheet and I don't quite understand these problems. My book is confusing too. Can you please explain them and show all the work? I want to be able to understand it well. Thanks!

1.) What is the molarity of a potassium chloride solution that has a volume of 400.0 mL and contains 85.0 g KCl?

2.) How many milliliters of a stock solution of 2.00 M KNO3 would yoou need to prepare 250 mL of 0.150 M KNO3?

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