What is the mass of 4.50 moles of chlorine gas Cl2?

To find the mass of 4.50 moles of chlorine gas (Cl₂), we first need to determine the molar mass of Cl₂. Chlorine has an Atomic Mass of approximately 35.45 g/mol, so the molar mass of Cl₂ is about 70.90 g/mol (2 * 35.45 g/mol). Therefore, the mass of 4.50 moles of Cl₂ is calculated as follows: 4.50 moles × 70.90 g/mol = 318.45 grams.