【简答题】Definitions of O besity A: How does one define when a person is considered to be obese and not just somewhat overweight? Height-weight tables give an approximate guideline as to whether one is simply ...
【单选题】A compound contains 40.0 % C, 6.71 % H, and 53.29 % O by mass. The molecular weight of the compound is 60.05 amu. The molecular formula of this compound is __________.