You want how many mols? That's mols = M x L = ?
Then mols NH4Cl = grams NH4Cl/molar mass NH4Cl. You know molar mass and mols, solve for grams.
If you want to prepare 2.0 liters of a .25 M solution of NH4Cl, how many grams of the salt should you weigh out?
3 answers
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.94