1.

Iron is prepared from one of its ore hematite Fe_(2)O_(3) by reaction with carbon as follows: Fe_(2)O_(3)(s)+C(s)rarrFe(s)+CO_(2)(g)uparrow Above reaction occur in an open furnance. Mass of Carbon required to produce 112kg of pure iron:

Answer»

36kg
18kg
48kg
72kg

Solution :`2Fe_(2)O_(3)(s)+3C(s)rarr12Fe(s)+3CO_(2)(G)uparrow`
`n_(C)=(n_(Fe))/(4)xx3=(112)/(56)xx(3)/(4)`
`w_(C)=(112)/(56)xx(3)/(4)xx18kg`


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