Calculate the number of moles in 168.0 g of HgS
M(HgS) = 232.65 g/mol
n=mMn=168.0232.65=0.72 moln = \frac{m}{M} \\ n = \frac{168.0}{232.65} = 0.72 \;moln=Mmn=232.65168.0=0.72mol
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