As with any combustion reaction, the products of combusting a hydrocarbon fuel (CxHy) with oxygen (O2)...

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Chemistry

As with any combustion reaction, the products of combusting ahydrocarbon fuel (CxHy) with oxygen (O2) are carbon dioxide (CO2)and water (H2O).
A mass of 16.89 g for an unknown fuel was combusted ina reaction vessel containing an unknown amount of oxygen. At theend of the reaction, there still remained 16.85 g of the fuel aswell as 0.0654 g of water and 0.1198 g of carbon dioxide. Theoxygen was completely consumed during the reaction.
How many molecules of oxygen gas were initially present in thereaction vessel?
Express the number of molecules to three significant digits

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3.9 Ratings (747 Votes)

Note the reaction will contain the same amount ofoxygen gas as the amount of oxygen gas found in water and carbondioxideGiven dataMass of H2O 00654gMass of CO2 01198gWe know that Molar mass of 1 O 159990gmol2 H2O 180153gmol3 CO2 440100gmol4 O2 319980gmolStep1 Calculation amount of oxygen present See Answer

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