How to solve this chemical equation?

Question

Q: You will perform a titration to determine the molar concentration of a NaOH solution.

The balanced equation for the reaction is shown below: 

H2C2O4 + 2 NaOH → Na2C2O4 + 2 H2O 

How many moles of NaOH will be required to neutralize 0.000835 moles of oxalic acid? 

Answer 1

H2C2O4 + 2 NaOH → Na2C2O4 + 2 H2O  ... balanced equation

From this balanced equation we see that it takes TWO moles of NaOH for every ONE mole of oxalic acid.

Therefore to neutralize 0.000835 moles oxalic acid, it will take TWICE as many moles of NaOH.

0.000835 moles oxalic acid x 2 mole NaOH/mol oxalic acid = 0.00167 moles NaOH needed