Put 8 g of sodium hydroxide solid into 100 g of dilute hydrochloric acid and the reaction is just complete. Calculate the solute mass fraction of dilute hydrochloric acid

Put 8 g of sodium hydroxide solid into 100 g of dilute hydrochloric acid and the reaction is just complete. Calculate the solute mass fraction of dilute hydrochloric acid

NaOH+HCl=NaCl+H2O
40 36.5
8g x
40/8g=36.5/x
x=7.3g
7.3g/100g*100%=7.3%