A 0.542 g sample of an unknown monoprotic weak acid requires 28.67 mL of 0.1093 M NaOH for neutralization. What is the molar mass of the acid?
When I did it I got 173 g/mol, but Im uncertain.
A) 88.0 g/mol
B) 109 g/mol
C) 173 g/mol
D) 218 g/mol
E) 352 g/mol