Chemistry

Isoenzymes are the different enzymes that catalyse the same biochemical reaction. However, they differ in amino acid composition and kinetic properties. Examples of isoenzymes are hexokinase and lactate dehydrogenase. 

Number of mole of $\mathrm{X}=\frac{6.022*{10}^{22}}{6.022*{10}^{23}}=\frac{10}{\text{Molar mass of}\mathrm{X}}$

So molar mass of $X=100\mathrm{g}$

Molarity $=\frac{5}{100*2}=0.025\mathrm{M}$

Ans. $=0.025\mathrm{M}$

$\mathrm{M}=25*{10}^{-3}$

So $P=25$