Question

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HURRY PLEASE! help me - you do not have to explain your answer If you dont want to, I just want the 2 answers to these two multiple choice problems because I am struggling!

Answer 1

Answer: We must use 5 moles of
`Fe_2O_3`

8.19 moles of oxygen are needed

Step-by-step explanation:

The balanced chemical reaction is:

`Fe_2O_3(s)+3CO(g)\rightarrow 2Fe(l)+3CO_2(g)`

As is the limiting reagent as it limits the formation of product and is the excess reagent.

According to stoichiometry :

2 moles of require = 1 mole of

Thus 10 moles of
`Fe` will require=
`(1)/(2)* 10=5moles` of
`Fe_2O_3`

Thus we must use 5 moles of
`Fe_2O_3`

The balanced chemical reaction is:

According to stoichiometry :

2 moles of require = 3 mole of
`O_2`

Thus 5.46 moles of
`Fe_2O_3` will require=
`(3)/(2)* 5.46=8.19moles`

8.19 moles of oxygen are needed