What is the molal elevation constant if one gram mole of a nonvolatile solute is dissolved in $1 \ kg$ of ethyl acetate? $(\Delta T_{b} = x \ K)$

The boiling point of a solution of $0.1050 \ g$ of a substance in $15.84 \ g$ of ether was found to be $100^\circ C$ higher than that of pure ether. What is the molecular weight of the substance? [Molecular elevation constant of ether per $100 \ g = 21.6$]

When $0.01 \ mol$ of nonvolatile solute is dissolved in a certain solvent,calculate the mass of the solvent in $kg$ if $\Delta T_{b} = 0.6 \ K$ and $K_{b}$ for the solvent $= 2 \ K \ kg \ mol^{-1}$. (in $kg$)

Molal elevation constant is the elevation in boiling point produced by

The molal elevation constant is the ratio of the elevation in boiling point to the $......$.

The following graph shows the vapour pressure (in $atm$) on the $y$-axis versus temperature $T$ (in $K$) on the $x$-axis for pure water and an aqueous urea solution. What is the boiling point (in $K$) of the urea solution? (Atmospheric pressure $= 1 \ atm$)