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A sample of argentite ore contains 1.34%...

A sample of argentite ore contains 1.34% of `Ag_(2)S` by mass. How many grams of this ore would give 1g of Ag on extraction?

A

`74.6 g`

B

`85.7 g`

C

`107.9 g`

D

`134.0 g`

Text Solution

Verified by Experts

The correct Answer is:
B
100 g ore = 1.34 g of `Ag_(2)S`
Molar mass of `Ag_(2)S = 248 mol^(-1)`
248 g of `Ag_(2)S = 2xx108g of Ag = 216 g of Ag 1.00 g of Ag`
`= 1.00 g of Agxx((248AG_(2)S)/(216gAg))xx((100gore)/(1.34gAg_(2)S))`
`= 85.68 g = 85.7 g`
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