Q.
Iron can be obtained by reduction of iron oxide $(Fe_{3}O_{4})$ with $CO$ according to the reaction:
$Fe_{3}O_{4} + 4CO \to3Fe +4CO_{2}$
How many kg of $Fe_{3}O_{4}$ should be heated with $CO$ to get $3\, kg$ of iron?
Some Basic Concepts of Chemistry
Solution: