alculate the mass (in g) of two moles of chlorine molecules (Cl2).                  M Cl = 35.45 g mol–1141.8 g70.90 g1.204 × 1024 g35.45 g

1. Break Down the Problem

To find the mass of two moles of chlorine molecules (Cl₂), we will perform the following steps:

1. Calculate the molar mass of Cl₂.
2. Use the molar mass to find the total mass of two moles of Cl₂.

2. Relevant Concepts

• Molar mass of an element: The mass of one mole of a substance (element or compound) measured in grams per mole (g/mol).
• Formula for total mass: $\text{Total mass} = \text{Number of moles} \times \text{Molar mass}$

3. Analysis and Detail

1. Calculate the molar mass of Cl₂: $M_{\text{Cl}_2} = 2 \times M_{\text{Cl}} = 2 \times 35.45 \, \text{g/mol} = 70.90 \, \text{g/mol}$

2. Calculate the total mass for two moles of Cl₂: $\text{Total mass} = 2 \, \text{moles} \times 70.90 \, \text{g/mol} = 141.80 \, \text{g}$

4. Verify and Summarize

The calculations have been verified, and the total mass of two moles of chlorine molecules (Cl₂) is 141.80 g.

Final Answer

The mass of two moles of chlorine molecules (Cl₂) is 141.80 g.