[填空题]
Eugenol is an oily, aromatic fk *ix4x d hk93gd-:aaliquid extracted from :5a ueip1 l( icfc0vmf *5yajc533sfgessential oils such as clove and cinnamon. The molecular formula of ei5agys1ffacv *l5:3cf3( 5j iuempc0ugenol 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.
