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I don't understand how to calculate the volume of the solution the researcher needs for problem G11 of the 6th edition. How do I know which is the initial volume of the problem is if I am just given the initial mass and final mass?
You are given the initial molarity and the final mass. Recall that molarity is moles/liter, and the problem states the moles you want. If you divide moles by moles/liter, you are left with the volume. Always start by looking at the units of what's given to help you start the problem.
For the beginning of these problems, I always find it helpful to write down new formulas (especially because it helps with my memory) without anything plugged into them. Alike to what Chem_Mod has said, doing this and finding what data is available helps you make a connection and forwards your problem solving.
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