17. (1 point) which of the following is not an empirical formula? *
sb₂s₃
c₂h₃o
becr₂o₇
c₂h₆
18. (1 point) which of the following is not true about empirical and molecular formulas? *
the molecular formula can be a whole number multiple of the empirical formula.
the molecular formula of a compound can be the same as its empirical formula.
the empirical formula of a compound can be twice the molecular formula.
several compounds can have the same empirical formula, but have different molecular