Academic Subjects
➤
Chemistry
➤
General Chemistry
➤
Chemical Reactions
➤
Hg from CaO
Mercury can be obtained by reacting mercury(II) sulfide with calcium oxide.
How many grams of calcium oxide are needed to produce 134.4 g of Hg?
4 HgS
(s)
+ 4 CaO
(s)
⇒
4 Hg
(l)
+ 3 CaS
(s)
+ CaSO
4(s)
We already have our balanced equation, so let's set up our calculations
g to mole ↔ mole to mole ↔ mole to g
134.4
g Hg
(1
mole Hg
)
/
(200.59
g Hg
)
(4
moles CaO
)
/
(4
moles Hg
)
(40.08 g CaO)
/
(1
mole CaO
)
= 26.85 g CaO
It will take 26.85 g CaO to produce 134.4 g of Hg