RoseMarie Gallagher and Paul Ingram Solutions for Chapter: Using Moles, Exercise 8: Q

Define the term $\%$ yield.

Define the term $\%$ purity.

$100 \mathrm{g}$ of aspirin was obtained from $100 \mathrm{g}$ of salicylic acid. What was the $\%$ yieId?

$17 \mathrm{kg}$ of aluminium was produced from $51 \mathrm{kg}$ of aluminium oxide $\left({\mathrm{Al}}_2{\mathrm{O}}_3\right)$ by electrolysis. What was the percentage yield? $\left[{\mathrm{A}}_{\mathrm{r}}: \mathrm{Al}= 27, \mathrm{O}=16\right]$

Some seawater is evaporated. The sea salt obtained is found to be $86 \%$ sodium chloride. How much sodium chloride could be obtained from $200 \mathrm{g}$ of this salt?

A $5.0 \mathrm{g}$ sample of dry ice (solid carbon oxide) turned into $2400 {\mathrm{Cm}}^3$ of carbon dioxide gas at rtp. What was the percentage purity of the dry ice? $\left[{\mathrm{M}}_{\mathrm{r}} \mathrm{of} {\mathrm{CO}}_2 = 44\right]$