How much NaCl should I use to make 0.5 L of a 0.1 M solution? (mw of NaCl = 58.4)

Question

I got 2.92 grams. Could someone let me know if that’s correct?

Answer 1

molarity is:

M= mol/L

so if you have the molarity and the amount of liters you can solve for the moles.

0.1M = xmol/0.5L

mol = 0.05 mol

now with this you can find grams given the at. weight of NaCl

0.05 mol x 58.4g/mol mols cancel each other top to bottom and you have 2.92g

So yes this is correct.