Answer :

Final answer:

The mass of 5 moles of chlorine gas (Cl₂) can be determined by multiplying the number of moles by the molar mass of Cl₂, which is double the atomic mass of Cl because a molecule of Cl₂ contains two atoms. The mass of 5 moles of Cl₂ is 5 * 71 g/mol = 355g.

Explanation:

The number of moles of a substance can be converted to mass by using the molar mass, which is the atomic or molecular mass expressed in grams. In this case, the atomic mass of Chlorine (Cl) is given as 35.5 grams per mole (g/mol).

To find the mass of 5 moles of chlorine gas (Cl₂), we need to double the atomic mass because a molecule of chlorine gas is made up of two chlorine atoms (Cl₂). This gives us a molar mass of 35.5 g/mol × 2 = 71 g/mol.

Now all we have to do is multiply the number of moles of chlorine gas by the molar mass: 5 * 71 g/mol = 355 g. So, the mass of 5 moles of chlorine gas is 355 grams.

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