Stoichiometry Help

[LuisV]

I need help with this problem.

A certain rocket uses butane, C4H10, as fuel. How many kilograms of liquid oxygen should be carried for the complete combustion of each 1.00 kg of butane to carbon dioxide and water vapor?

What I have so far:

2C4H10 + 13O2 = 8CO2 + 10H2O <-- Balanced Equation
1 mole C4H10 = 58g
1 mole O2 = 32g

[Fuentes]

Hi! It's very easy to solve. You only have to do this divition: 416kg of O2/116 kg of C4H10 = 3.586kg of O2