207. If 5 grams of $\text{LiAlH}_4(\text{s})$ reacts with water, according to the equation for $\text{Li}$, $11/2\,\text{L}$ of gas is produced at STP conditions, what is the purity percentage of $\text{LiAlH}_4(\text{s})$? $(\text{Al}=27,\ \text{Li}=7,\ \text{H}=1:\text{g.mol}^{-1})$ $$\text{LiAlH}_4(\text{s})+\text{H}_2\text{O}(\text{l})\rightarrow \text{LiOH}(\text{aq})+\text{Al(OH)}_3(\text{s})+\text{H}_2(\text{g}) \quad \text{(equation to be balanced)}$$ (1) $80$ (2) $85$ (3) $90$ (4) $95$
\textbf{207.} If 5 grams of $\text{LiAlH}_4(\text{s})$ reacts with water, according to the equation for $\text{Li}$, $11/2\,\text{L}$ of gas is produced at STP conditions, what is the purity percentage of $\text{LiAlH}_4(\text{s})$? $(\text{Al}=27,\ \text{Li}=7,\ \text{H}=1:\text{g.mol}^{-1})$
$$\text{LiAlH}_4(\text{s})+\text{H}_2\text{O}(\text{l})\rightarrow \text{LiOH}(\text{aq})+\text{Al(OH)}_3(\text{s})+\text{H}_2(\text{g}) \quad \text{(equation to be balanced)}$$
(1) $80$ \hfill (2) $85$ \hfill (3) $90$ \hfill (4) $95$