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2 votes
How much silver can be recovered from 124 g of Ag₂S?

42.7 g
62.1 g
93.2 g
124 g

asked
User Gkb
by
8.0k points

1 Answer

0 votes

Final answer:

The amount of silver that can be recovered from 124 g of Ag₂S is approximately 107.22 g.

Step-by-step explanation:

To calculate the amount of silver that can be recovered from Ag₂S, we need to first determine the molar mass of Ag₂S. Ag has a molar mass of 107.87 g/mol, and S has a molar mass of 32.07 g/mol. So, the molar mass of Ag₂S is 107.87 g/mol * 2 + 32.07 g/mol = 247.81 g/mol.

Next, we can use the molar mass of Ag₂S to calculate the amount of silver in 124 g of Ag₂S using the following formula:

Amount of silver = (mass of Ag₂S / molar mass of Ag₂S) * (2 moles of Ag / 1 mole of Ag₂S)

Substituting the values, we get: Amount of silver = (124 g / 247.81 g/mol) * (2 moles of Ag / 1 mole of Ag₂S) = 0.995 moles of Ag.

Finally, we can convert moles of Ag to grams using the molar mass of Ag, which is 107.87 g/mol: Mass of silver = 0.995 moles of Ag * 107.87 g/mol = 107.22 g.

answered
User Jens Mikkelsen
by
7.5k points
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