The ionization constant, Ka, for benzoic acid, HC7H5O2, is 6.28 × 10‑5. What is the pH of a 0.15 molar solution of this acid?

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer

is there any options? maybe im just not seeing them but i need the options to

-love shrooms

i think its 100.

hope this !