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?

Thanks for taking the time to read Which expression gives the mass in grams of one molecule of chlorine gas Cl₂ A 71 g B 35 5 g C 70 9 g. We hope the insights shared have been valuable and enhanced your understanding of the topic. Don�t hesitate to browse our website for more informative and engaging content!

Rewritten by : Barada