After 11.0 mol of propane is partially burned burned to form carbon dioxide, 6.30 mol of propane remains. What is the number of moles of oxygen that the reaction consumes?

1 Answer
Ernest Z.
Dec 20, 2017

The number of moles of oxygen consumed in the reaction is 23.5.

Explanation:

The equation for the reaction is

#"C"_3"H"_8 + "5O"_2 → "3CO"_2 + "4H"_2"O"#

#"Moles of C"_3"H"_8color(white)(l) "consumed = (11.0 - 6.3) mol = 4.7 mol"#

∴ #"Moles of O"_2 color(white)(l)"consumed" = 4.7 color(red)(cancel(color(black)("mol C"_3"H"_8))) × "5 mol O"_2/(1 color(red)(cancel(color(black)("mol C"_3"H"_8)))) = "23.5 mol O"_2#

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