The molecular formula expresses:
Correct answer: B. Actual number of atoms
- A. Relative number of atoms and electrons
- B. Actual number of atoms
- C. Both relative and actual number of atoms
- D. None of the above
Explanation
The molecular formula provides the actual number of each type of atom present in a specific molecule, such as C6H12O6 for glucose, indicating 6 carbon, 12 hydrogen, and 6 oxygen atoms. It does not convey information about electrons or relative numbers of atoms, which are represented by the empirical formula. Therefore, Option B is the correct choice, while the other options misunderstand the role of the molecular formula.
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Mole calculations connect mass, number of particles and Avogadro's number, while balanced equations provide the mole ratios used in stoichiometry. Questions cover limiting and excess reactants, theoretical yield and percentage yield, including identifying which reactant is consumed first and comparing the actual product with the maximum possible product.
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