Using the concentration of the base and the volume of the base used, calculate the moles of the base used in the titration. then, using the mass of the acid, determine the molar mass of the acid.
data:
concentration of the base(naoh)= 0.19 m
volume of the base used= 8.72 ml
mass of the acid(unknown)= 0.33 g

Explanation:

I am assuming that the unknown acid is monobasic. Then the general equation for the reaction is

HA + MOH ⟶ MA + H₂O

(a) Moles of MOH

(b) Moles of HA

Now, you use the molar ratio from the balanced chemical equation to find the moles of unknown acid.

(c) Molar mass of HA

The molar mass of the unknown acid is

a rain shadow is a dry region of land on the side that is protected against the prevailing winds of a mountain range. the prevailing winds are the winds that occur most of the time in a particular place of the earth

prevailing winds carry air toward the mountain range. as the air rises up over a mountain range, the air cools, water vapor condenses, and clouds form. on this side of the mountains, called the windward side, precipitation falls in the form of  rain  or snow. this dry air produces a  rain shadow.