Question

Given the equation Fe2O3(s) + 3CO(g)-->2Fe(s) + 3CO(g) how many moles of carbon monoxide (CO) are needed to react completely with 1.75 moles of iron (III) oxide (Fe2O3)?

Answer 1

write a relationship of the moles (n) with the stoichiometric coefficients like this:

aA + bB <-> cC

a,b,c (lowercase) are the coefficient and A,BC are the species

\[\frac{ n _{A} }{ a }=\frac{ n _{B}}{ b }\]