Someone help pleas Calculate the % change in pH when 4.052 g of solid NaOH (39.997 g/mol) is added to a 394 mL buffer solution of HX 0.57 M and NaX 0.31 M?

Ka for HX is 2.0 x 10-5.

altitude, density, pressure

air gets less dense the higher the altitude and also the air pressure is less as altitude rises.

i think it is true since you can test the answer and can use observations to complete it.