Answer:
0.25 mol of water
Explanation:
The starting point is writing out a balanced chemical equation
[tex]2LiHCO_{3} --->Li_{2}O +2CO_{2} +H_{2}O[/tex]
From here we can see that 2 moles of Lithium hydrogen carbonate produce 1 mole of water. It follows that 0.5 moles of Lithium hydrogen carbonate will produce half of that too, which is 0.25 moles. The ratio is always mantained.
