Which of the following statements is true about the molar mass of chlorine gas?

• A. The molar mass of chlorine gas is equal to the sum of the atomic masses of two chlorine atoms.
• B. The molar mass of chlorine gas is calculated by dividing the atomic mass of chlorine by two.
• C. The molar mass of chlorine gas is the same as the atomic mass of a single chlorine atom.
• D. Chlorine gas has a molar mass of approximately 35.5 g/mol.

Answer: (A)

Verified step by step guidance

1. Understand that chlorine gas (Cl\_2) is a diatomic molecule composed of two chlorine atoms bonded together.
2. Recall that the molar mass of a molecule is the sum of the molar masses of all atoms in the molecule.
3. Identify the atomic mass of a single chlorine atom, which is approximately 35.5 g/mol.
4. Calculate the molar mass of chlorine gas by adding the atomic masses of two chlorine atoms: \(\text{Molar mass of Cl}_2 = 2 \times 35.5\ \text{g/mol}\).
5. Compare this value to the given options to determine which statement correctly describes the molar mass of chlorine gas.