Lawrie Ryan and Roger Norris Solutions for Chapter: Atoms, Molecules and Stoichiometry, Exercise 22: Question

Calculate the concentration, in $\mathrm{mol} {\mathrm{dm}}^{-3}$, of the following solution: (${\mathrm{A}}_{\mathrm{r}}$ values: $\mathrm{H}=1.0, \mathrm{Na}=23.0, \mathrm{O}=16.0$).

A solution of sodium hydroxide, $\mathrm{NaOH}$, containing $2.0 \mathrm{g}$ of sodium hydroxide in $50 {\mathrm{cm}}^3$ of solution.

Calculate the concentration, in $\mathrm{mol} {\mathrm{dm}}^{-3}$, of the following solution: (${\mathrm{A}}_{\mathrm{r}}$ values: $\mathrm{C}=12.0, \mathrm{H}=1.0, \mathrm{O}=16.0$).

A solution of ethanoic acid, ${\mathrm{CH}}_3{\mathrm{CO}}_2\mathrm{H}$, containing $12.0 \mathrm{g}$ of ethanoic acid in $250 {\mathrm{cm}}^3$ of solution.

Calculate the number of moles of solute dissolved in $40 {\mathrm{cm}}^3$ of aqueous nitric acid of concentration $0.2 \mathrm{mol} {\mathrm{dm}}^{-3}$. 

Calculate the number of moles of solute dissolved in $50 {\mathrm{cm}}^3$ of calcium hydroxide solution of concentration $0.01 \mathrm{mol} {\mathrm{dm}}^{-3}$.