I need to calculate the moles of HCl that reacted with 0.80g of NaOH

This is an acid-base titration calculation.

HCl (known as hydrogen chloride in a gas state and as hydrochloric acid when dissolved in water), reacts with NaOH Sodium hydroxide (lye) with a molar titration ratio

of 1:1.

The gram molecular mass of NaOH is 39.99715g/mole. To find the moles of 0.80g of NaOH divide the known mass by the gram molecular mass of Sodium hydroxide.

Incidentally, the gram molecular mass of HCl is 36.4611g/mole.

Note that the molar ratios are 1 to 1, but the mass ratios are not.

~~D~~

I have no idea about chemistry but I will assume DavidQD knows what he is talking about and tick the answer.