Calculate molar concentration $($ mol$*d{m}^{-3})$ of potassium sulfate, which was prepared by dissolving of $77g$ of potassium sulfate in water. The final volume of the solution is $731mL.$

$A_r(K)=39\mathrm{.}10$;$A_r(S)=32\mathrm{.}06$;$A_r(O)=16\mathrm{.}00$

Result$($three decimal places$)$:

$()-3$

D$.$ Timurogla, u$$o $553955,\frac{5}{1}\frac{?}{2024}11$:$50\mathrm{.}2$