Question

Question #2a7bc

Answer 1

`0.8` moles

Explanation:

Given reaction and its balanced equation is

`2"Al"(s) + 3"FeO"(s) -> 3"Fe"(s) + "Al"_2"O"_3(s)`

From the equation
`3` moles of `"FeO"` react completely with moles of `"Al"=2`
`:.1` moles of `"FeO"` reacts completely with moles of `"Al"=2/3`
or `1.2` moles of `"FeO"` react completely with moles of `"Al"`
`=2/3xx1.2=0.8`

Answer 2

Looking at the mole ratio between FeO : Al, by looking at the equation, you can see that the mole ratio is 3 : 2.

So, Imagine if 3 moles of FeO gives you 2 moles of Al,

then 1.2 moles of Feo should give you:
[`1.2 -: 3 xx 2`] = 0.80 moles of Al.

Therefore, 0.80 moles of Al are needed to react completely with 1.2 moles of FeO.