Question

1) You are asked to make 10 miles of iron (Fe) from iron oxide (Fe2O3) and excess carbon monoxide (CO). Fe2O3(s) + 3CO(g)—> 2Fe(l) + 3O2(g). How many moles of iron oxide must you use.
A) 3 moles
B) 2 moles
C) 10 moles
D) 5 moles

2) 2C4H10 + 13O2–> 8CO2 + 10H2O. If I want to produce 50g of H2O using the above combustion reaction, how many mol of C4H10 should I use?

A) 0.55 mol C4H10
B) 10 mol C4H10
C) 2.77 mol C4H10
D) 3.79 mol C4H10

Answer 1

For both of them, used the balanced equation and it’s mole ratio to convert whatever you need to into moles. See the attacked work.

1) D 5 mols

2) A 0.55 mols