Answer :
Final answer:
The mass of 2 moles of chlorine gas, considering that chlorine exists as a diatomic molecule (Cl2) in nature, would be 142 grams.
Explanation:
Mass is an intrinsic property of a body. It was traditionally believed to be related to the quantity of matter in a body, until the discovery of the atom and particle physics. It was found that different atoms and different elementary particles, theoretically with the same amount of matter, have nonetheless different masses.
The relative atomic mass of chlorine is 35.5 g/mol, however, chlorine exists as a diatomic molecule (Cl2) in nature. Therefore, the molar mass of a chlorine molecule is 35.5 g/mol * 2 = 71 g/mol. This molar mass indicates the mass of one mole of chlorine. If we have 2 moles of chlorine gas, then the total mass would be 2 * 71 g/mol = 142 grams.
This can be understood by looking into the atomic theory of matter, which postulates that the copper-to-chlorine ratio in compounds and the ratio of their masses is directly relatative to the number of atoms involved.
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