# chemistry

how many grams of oxygen are required to burn completely 570g of octane?

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1. Write and balance the equation.
2C8H18 + 25O2 ==> 16CO2 + 18H2O

convert 570 gh C8H18 to mols. mol = g/molar mass octane.

Using the coefficients in the balanced equation convert mols octane to mols O2.

Now convert mols O2 to grams. g = mols x molar mass.

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posted by DrBob222
2. 52 g

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