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CHEMACTIVITY 6C: MASS PERCENT AND EMPIRICAL
FORMULA
POSSIBLE CLICKER QUESTIONS
After CTQ 3:
1. What is the approximate mass percent of Cl in CCl2F2?
2. A particular sample of a compound has 3.0 g H and 24 g O. What is the approximate mass
percent of H in the compound?
3. A particular sample of a compound is found to have 4 mol C and 8 mol O. Which of the
following chemical formulas are consistent with just these data?
4. Several compounds have the empirical formula CH2, but different molecular formulas.
Which of the following must be different?
5. A compound has the empirical formula HO, and the molecular weight is 34.02 g/mol. What
is the molecular formula?
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