Question #2a7bc

2 Answers
May 12, 2016

Answer:

#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#

May 13, 2016

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.