Question

10.

Answer 1

Answer: 1.8 moles Fe and 2.7 moles $CO_2$ are produced.

Explanation:

The balanced chemical reaction is:

$Fe_2O_3+3CO\rightarrow 2Fe+3CO_2$  

According to stoichiometry :

3 moles of $CO$ require 1 mole of $Fe_2O_3$

Thus 2.7 moles of $CO$ will require=$\frac{1}{3}\times 2.7=0.9moles$  of $Fe_2O_3$

Thus $CO$ is the limiting reagent as it limits the formation of product and $Fe_2O_3$ is the excess reagent.

As 3 moles of $CO$ give = 2 moles of $Fe$  and 3 moles of $CO_2$

Thus 2.7 moles of $CO$ will give =$\frac{2}{3}\times 2.7=1.8moles$  of $Fe$  and $\frac{3}{3}\times 2.7=2.7moles$  of $CO_2$

Thus 1.8 moles Fe and 2.7 moles $CO_2$ are produced.