Solving a Chemistry Problem: Moles of Oxygen Required to Burn Octane

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Homework Statement

2 C8 H18 + 50 O2 --> 16 C O2 + 18 H2 O

How many moles of oxygen are required to burn 5.00 moles of octane?

I got 125?

Homework Equations

The Attempt at a Solution

 

[Borek]

Check if the oxygen is balanced.

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[Tinger]

Check if the oxygen is balanced.

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buffer calculator, concentration calculator
pH calculator, stoichiometry calculator

The oxygen IS balanced though?

 

[Borek]

Is it?

How many atoms on the left? How many atoms on the right?

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methods

 

[Tinger]

Oh sorry my mistake, borek
thats why I'm getting bad results for chemistry, eh? :S