chem help please

Question

If you want to make a 0.617 M solution using 7.27 grams of sodium hydroxide, how many milliliters does the solution need to occupy?

Answer 1

molar mass NaOH = 39.99 g/mol

0.617 M = 0.617 moles / liter

7.27 g NaOH x 1 mol/39.99 g = 0.1818 moles

0.1818 / x L = 0.617 mol/ 1 L

x = 0.2946 L = 294.6 mls = 295 mls (3 sig. figs.)

Check:

0.1818 moles / 0.2946 L = 0.617 M