Given the balanced chemical equation: H2SO4(aq) + 2NaOH(aq) → Na2SO4(aq) + 2H2O(l), in an acid-base titration, 25 milliliters of 0.2 molar H2SO4 were required to neutralize 100 milliliters of NaOH solution. Providing your answer as a decimal to the nearest tenth, what is the molarity of the NaOH solution?