$0.023\times {10}^{22}$ molecules are present in $10\mathrm{g}$of a substance ${}^{\text{'}}\mathrm{x}^{\text{'}}.$ The molarity of a solution containing $5\mathrm{g}$ of substance 'x' in 2 L solution is $\_\_\_\_\_\_\_\_\_\times {10}^{-3}$
 

$1.46 \mathrm{g}$ of a biopolymer dissolved in a $100 \mathrm{mL}$ water at $300 \mathrm{K}$ exerted an osmotic pressure of $2.42\times {10}^{-3}\mathrm{bar}$ 

The molar mass of the biopolymer is $-\times {10}^4 \mathrm{g}$ ${\mathrm{mol}}^{-1}.$ (Round off to the Nearest Integer)
[Use: $\mathrm{R}=0.083 \mathrm{L}$ bar $\left.{\mathrm{mol}}^{-1}{ \mathrm{K}}^{-1}\right]$