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. 0.0641
B. 0.072
C. 0.0827
D. 0.108

Answer

B

Explanation

`underset(2xx108=216g)underset(2"mol")(2Ag)+S to underset(248g)underset(2"mol")(Ag_(2)S)`
Amount of `Ag_(2)S` that can eb formed from 1.5g silver `=(248)/(216)xx1.5=1.722g`
`"% yield of "Ag_(2)S=(0.124)/(1.722)xx100=7.2`