Acid Base Chemistry! Please Help!!?

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Sodium hydride, NaH(s), reacts with liquid water to form NaOH(aq) and H2 gas.

(a) Write the equation of the reaction and explain it from the veiwpoint of the Bronsted-Lowry acid-base theory.
(b) Calculate pOH and pH for the solution formed from dissolving 10.0 g NaH(s) in enough water to make 1.00 L of a solution.
(c) How many grams of N2O5 would be required to neutralize this solution?

Any help would be much appreciated!!

I'm only completely sure of the equation:
NaH (s) + H2O (l) -> NaOH (aq) + H2 (g)
I think i have the first two parts:

I got a pH of 0.38 and a pOH of 13.62.

I'm confused about the third part. Where does the N2O5 come in? Do we assume a 1:1 mole ration between N2O5 and NaH?
 
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