Find the osmotic pressure of 0.01 M solution at 25 °C $(R = 0.0821\ \text{L atm mol}^{-1}\text{K}^{-1})$

Identify the colligative property from the followings?

Calculate $\Delta T_b$ of a $0.45$ m solution of a nonvolatile solute in solvent if molal elevation constant of solvent is $3.0$ K kg mol$^{-1}$

Calculate the mass of nonvolatile solute dissolved in $0.3$ dm$^3$ water having osmotic pressure $0.1$ atm at $300$K.
[Molar mass of solute = $328$ g mol$^{-1}$, R = $0.082$ dm$^3$atm K$^{-1}$mol$^{-1}$]