The percentage of mercury in the ore : 2.49%
Further explanation
Given
12 g of sample
2.89% HgS
Required
The percentage
Solution
mass of HgS in the ore :
= 2.89% x 12 g
= 0.3468 g HgS
Mass of Hg in HgS :
= (Ar Hg/MW HgS) x mass HgS
= (200.592/232,66 g/mol) x 0.3468
= 0.299 g
% mercury (Hg) in sample(a crude ore) :
= (0.299 g : 12 g) x 100%
= 2.49%
