Which of the following is represented in a chemical formula?

• A. The rate of a chemical reaction
• B. The temperature at which a reaction occurs
• C. The types and numbers of atoms in a compound
• D. The physical state of a substance

Answer: (C)

Verified step by step guidance

1. Understand that a chemical formula is a symbolic representation that shows the types and numbers of atoms in a compound.
2. Recognize that the rate of a chemical reaction refers to how fast reactants are converted to products, which is not shown by a chemical formula.
3. Know that the temperature at which a reaction occurs is a physical condition and is not represented by a chemical formula.
4. Identify that the physical state of a substance (solid, liquid, gas) is often indicated separately (e.g., (s), (l), (g)) and is not part of the chemical formula itself.
5. Conclude that the chemical formula specifically represents the types and numbers of atoms in a compound, making this the correct choice.