For which of the following compounds the term empirical formula cannot be applied ?
Correct answer: D. It can be applied to all mentioned above
- A. NaCl
- B. H2O
- C. CCI4
- D. It can be applied to all mentioned above
Explanation
An empirical formula gives the simplest whole-number ratio of atoms. NaCl is already in its simplest ratio, H2O cannot be reduced, and CCl4 also has a simplest 1:4 ratio, so the term can be applied to all three. The likely mistake is choosing c because CCl4 looks like a molecular formula, but it also represents the simplest atom ratio.
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The mole connects the microscopic number of particles with measurable mass, using Avogadro's number, 6.022 × 10²³ particles per mole. Questions involve molar mass, conversion between mass, moles and particles, percentage composition, empirical and molecular formulas, and distinguishing atoms, molecules, ions and formula units.
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