What Is the Molarity of a Sodium Hydroxide Solution If

Multiple Choice

What is the molarity of a sodium hydroxide solution if 40.00 mL of NaOH is required to neutralize 0.900 g of oxalic acid,H₂C₂O₄, (90.04 g/mol) ? H₂C₂O₄(aq) + 2 NaOH(aq) →Na₂C₂O₄(aq) + 2 H₂O(l)

A) 0.125 M
B) 0.250 M
C) 0.400 M
D) 0.500 M
E) 0.800 M