17. Which of the following is NOT an empirical formula? *
a. Sb2S3
b. C2H3O
c. BeSO4
d. C2H6
18. Which of the following is NOT true comparing empirical and molecular formulas? *
a. The molecular formula can be a simple whole number multiple of the empirical formula.
b. The molecular formula of a compound can identical to its empirical formula.
c. The empirical formula of a compound can be twice the molecular formula.
d. Several compounds can start with the same empirical formula, but have different molecular formulas.
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