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In coal, pyrites (FeS(2)) is present as ...

In coal, pyrites `(FeS_(2))` is present as a pollution-causing impurity, which is removed by combustion.
`2FeS_(2) + 5O_(2) rarr 4SO_(2) + 2FeO`.
Calculate the moles of `SO_(2)` produced by burning 1.0metric ton `(10^(3) kg)` of coal containing 0.05% by mass of pyrites impurity?

A

`8.32 mol`

B

`4.16 mol`

C

`12.48 mol`

D

`2.08 mol`

Text Solution

Verified by Experts

The correct Answer is:
A
Mol of `SO_(2) = (1.0 xx 10^(6) g "coal")`
`((0.05 g Fe S_(2))/(100 g "coal"))((1 "mol" g FeS_(2))/(120 g "Coal"))`
`((4 "mol" SO_(2))/(2 "mol" FeS_(2)))`
`= (10^(6) xx 0.05 xx 1 xx 4)/(100 xx 120 xx 2) = 8.32 "mol" SO_(2)`
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