Calculate the molality of the solution of nonvolatile solute if it freezes at $-0.36^{\circ} \mathrm{C}$.

$\left[K_{\mathrm{f}}\right.$ for solvent $\left.=1.86 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}\right]$

Calculate $\Delta \mathrm{S}_{\text {Iotal }}$ for a certain reaction if $\Delta \mathrm{H}=-150 \mathrm{~kJ}$ and $\Delta \mathrm{S}=32 \mathrm{JK}^{-1}$ at 300 K .

If $\mathrm{E}^{-}\left(\mathrm{Cu}_{(a q)}^{+2} \mid \mathrm{Cu}_{(s)}\right)=+0.34 \mathrm{~V}$. What is potential for $\mathrm{Cu}_{(s)} \rightarrow \mathrm{Cu}_{(\mathrm{aq})}^{+2}(0.1 \mathrm{M})+2 \mathrm{e}^{-}$at 298 K ?

Calculate the edge length of bcc unit cell if radius of a particle present in it is 186 pm .