Question

How many moles of `Al` are needed to react completely with 1.2 mol `FeO` in the reaction `2Al + 3FeO -> 3Fe + Al_2O_3`?

Answer 1

0.8 moles

Explanation:

from the equation we can see,
`2` mole `Al` is needed to react completely with `3` mole `FeO`

so,
`3` moles of `FeO` needs `2` moles `Al`
so, `1` mole `FeO` needs `2/3` moles `Al`

so, `1.2`mol `FeO` needs `(2xx1.2)/3`moles `Al`

`=0.8`moles `Al`