Help please im in the middle of a science quiz!!

The number of moles of a given mass of a substance can be found without knowing its molecular formula or molar mass. true false

Why dose heating increase the speed at which a solution dissolved in water

The following questions a24 - a26 relate to 100 ml of 0.0150 m solution of benzoic acid (c6h3cooh). ka(c6h3cooh) = 6.4 x 10^-5. what is the ph of the solution after the addition of 1 x 10^-3 moles of naoh? you may assume no volume change to the solution upon addition of the naoh.