A 1.50g sample of an ore containing silver was dissolved and all of the `Ag^(+)` was converted to 0.124 g of `Ag_(2)S`. What was the percentage of silver in the ore?

Options

A. 14.23%
B. 8.27%
C. 10.8%
D. 7.2%

Answer

D

Explanation

`underset(2xx108=216g)(2Ag) + S to underset(248g)(Ag_2S)`
216 g of Ag froms 248g of `Ag_2S`
1.5 g of forms `248/216xx1.5=1.722g " of " Ag_2S`
% yield of `Ag_2S=(0.124)/(1.722)xx100=7.2%`