Question

How many grams of NaOH are required to prepare 250 mL of 0.205 M NaOH? SHOW ALL WORK and include units.

I don't know how to set this up.

Answer 1

How many mols do you need? That's M x L = mols.

Then grams = mols/molar mass. You know molar mass and mols, solve for grams.