Answer :
Final answer:
Molar mass of Cl2 is roughly 2 * relative atomic mass of Cl (71 g/mol). The mass of a substance depends on the number of moles and molar mass. So, 2 moles of Cl2 gas have a mass of around 142 grams.
Explanation:
Now we can solve for the mass of 2 moles of chlorine gas (Cl₂) using the concept of molar mass and Avogadro's constant:
Molar mass of Chlorine (Cl₂):
We are given that the relative atomic mass of chlorine is 35.5. However, chlorine gas exists as Cl₂ molecules, so the molar mass of Cl₂ is roughly 2 * 35.5 ≈ 71 grams per mole (g/mol).
Avogadro's constant (N_A):
Avogadro's constant represents the number of particles (atoms or molecules) in one mole of a substance. It's a very large number, approximately 6.022 x 10^23 particles per mole.
Mass of 2 moles of Cl₂:
We can use the following formula:
Mass (in grams) = Number of moles (n) x Molar mass (M)
Here, n = 2 moles and M = 71 g/mol for Cl₂ gas.
Mass = 2 moles x 71 g/mol ≈ 142 grams
Therefore, 2 moles of chlorine gas (Cl₂) have a mass of approximately 142 grams.
Your complete question would be:
The relative atomic mass of chlorine is 35.5. What is the mass of 2 moles of chlorine gas?
