Determine the degree of association (polymerization) for the reaction in aqueous solution
 $6HCHO\underset{ }{\rightleftharpoons }{C}_6{H}_{12}{O}_6$
If observed(mean) molar mass of HCHO and $C_6{H}_{12}{O}_6$ is 150.

$$\begin{gathered} \begin{array}{l}6HCHO\underset{ }{\rightleftharpoons }{C}_6{H}_{12}{O}_6\\ Conc.ateqm\\ \hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}C(1-\alpha )\frac{C\alpha }{6}\end{array} \\ \frac{Observedmolesconcentration}{Initialmolesconcentration}=\frac{M_T}{M_O} \end{gathered}$$

$M_T=$Theoretical molar mass of HCHO

$\frac{C(1-\alpha )+\frac{C\alpha }{6}}{C}=\frac{M_T}{M_O}=\frac{30}{150}\Rightarrow \alpha =0.96$