\begin{table}%t8
%%\centering

\par
\caption{\label{Mantle composition w.r.t H$_2$O at maximum mantle thickness for each model}Mantle composition w.r.t H$_2$O at maximum mantle thickness for each model.}
\begin{tabular}{lrrrrrrrr}
\hline\hline\noalign{\smallskip}
 Species          &     Model 1 &    Model 2 &    Model 3 &     Model 4 &    Model 5 &    Model 6 &    Model 7 & Model 8 \\
\hline
 $*$H$_2$O        &      100.00 &     100.00 &     100.00 &      100.00 &     100.00 &     100.00 &     100.00 &  100.00 \\
 $*$CH$_4$        &       34.23 &      28.62 &      32.50 &       28.34 &            &      31.51 &       3.08 &    2.45 \\
 $*$NH$_3$        &        5.94 &       3.88 &       5.04 &             &            &            &       1.14 &         \\
 $*$N$_2$         &        3.75 &       5.60 &       4.39 &        7.87 &      13.76 &       6.31 &       8.46 &   10.50 \\
 $*$CO            &        3.65 &       7.15 &       3.88 &       14.73 &      69.53 &       4.42 &      55.66 &   71.91 \\
 $*$CO$_2$        &             &       1.69 &            &        7.16 &      24.46 &       2.22 &      22.12 &   28.43 \\
 $*$O$_2$         &        1.24 &            &            &        5.65 &      12.79 &       2.17 &       2.77 &   15.49 \\
 $*$HNO           &             &            &            &        1.92 &       3.71 &       1.45 &       9.16 &   11.68 \\
 $*$C$_4$H        &             &            &            &             &            &            &            &    1.17 \\
\par
\hline
 $*$CH$_3$OH      &  7.98                & 14.70               & 11.46               &  10.32               & 12.12               & 13.05               & 1.91               & 1.57                \\
 $*$C$_2$H$_5$OH  &  $1.19\times 10^{-3}$ & $7.74\times 10^{-4}$ & $7.64\times 10^{-4}$ &  $9.50\times 10^{-4}$ & $1.28\times 10^{-3}$ & $6.21\times 10^{-4}$ & $3.49\times 10^{-2}$ & $2.43\times 10^{-2}$ \\
 $*$CH$_3$OCH$_3$ &  $5.80\times 10^{-7}$ & $2.60\times 10^{-7}$ & $2.10\times 10^{-7}$ &  $9.00\times 10^{-8}$ & $9.47\times 10^{-5}$ & $5.50\times 10^{-7}$ & $2.24\times 10^{-4}$ & $1.05\times 10^{-4}$ \\
\hline
\end{tabular}
\end{table}