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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?
Borek said:Check if the oxygen is balanced.
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To calculate the moles of oxygen required, you will need to use the balanced chemical equation for the combustion of octane, which is C8H18 + 12.5O2 → 8CO2 + 9H2O. From this equation, you can see that for every mole of octane, 12.5 moles of oxygen are required for complete combustion.
The molar mass of oxygen is 16.00 g/mol. This means that for every mole of oxygen, there are 16.00 grams of oxygen present.
To convert grams of octane to moles, you will need to use the molar mass of octane, which is 114.23 g/mol. Divide the given mass of octane by the molar mass to get the number of moles.
To determine the number of moles of oxygen needed to burn 1 gram of octane, you will first need to convert the mass of octane to moles using the molar mass. Then, use the mole ratio from the balanced chemical equation (12.5 moles of oxygen for every 1 mole of octane) to calculate the moles of oxygen needed.
The amount of oxygen required to burn octane can also be affected by other variables such as the temperature and pressure of the reaction, the efficiency of the combustion process, and the presence of impurities in the octane. These factors can alter the amount of oxygen needed for complete combustion and should be taken into consideration when solving a chemistry problem involving the combustion of octane.