Question

Which of the following is a valid mole ratio from the balanced equation 2Fe2O3 + 3C → 4Fe + 3CO2?

two moles of F e two O three over four moles of F e
four moles of C over three moles of F e
two moles of F e two O three over four moles of C
three moles of C over four moles of C O two

Answer 1

Answer:

2 moles of Ferric Oxide ($Fe_{2}O_{3}$) over 4 moles of Fe

Explanation:

Firts of all I want to explain the nomenclature that is involve in the equation:

$Fe_{2}O_{3}=$ Ferric Oxide

$C=$ Carbon

$Fe=$ Iron

$CO_{2}=$ Carbon Dioxide

Now, to understand the ratio from the balanced equation its necessary read the equation with the respective coefficients, for example:

• 2 moles of Ferric Oxide ($Fe_{2}O_{3}$)  reacts to produce 4 moles of Iron ($Fe=$)
• 3 moles of Carbon ($C$)  reacts to produce 4 moles of Iron ($Fe=$)
• 2 moles of Ferric Oxide ($Fe_{2}O_{3}=$)  reacts to produce 3 moles of Carbon Dioxide ($CO_{2}$)

Each of the above could be represent as a ratio, but is always necessary keep the respective coefficient, then if you read each option only the first has the respective coefficient, it means:

2 moles of Ferric Oxide ($2Fe_{2}O_{3}$)  reacts to produce 4 moles of Iron ($4Fe=$) or, in other words, 2 moles of Ferric Oxide ($2Fe_{2}O_{3}$) over 4 moles of Iron 4 ($4Fe=$)

Regards!