Question

How many moles of NaOH are required to react with one mole of solid $N_2{O}_5$?

Answer 1

$NaOH$ react with $N_2{O}_5$ to give $NaN{O}_3$ and $H_{2}O.$

So the reaction is :

$N_2{O}_5+NaOH\to NaN{O}_3+H_{2}O$

Balenced reaction is :

$N_2{O}_5+2NaOH\to 2NaN{O}_3+H_{2}O$

Hence, 2 moles of $NaOH$ is required.