[填空题]
Eugenol is an oily, aromatic liquid extracted from essential oils such as c5x c 7m*1wx6dxpikw t*ln;k 5ukhe-qs5 ove and cinnamon. Tehnq ;-ku5sk5he molecular formula of eugenol is $C_{10}H_{12}O_2$.
1.Calculate the molar mass of eugenol. $g\:mol^{-1}$
2.Determine the percentage by mass of carbon, hydrogen, and oxygen in eugenol.C= %H= %O= %
3.Predict the simplest, whole-number ratio of the atoms in eugenol.
