Homework Help: Chemistry

Posted by Elie on Monday, August 6, 2012 at 9:17pm.

A hydrocarbon gas burned completely in O2 to give CO2 and H2O. It was found that 1volume of a hydrocarbon gas at STP produced 2volumes of CO2 and 3 volumes of steam at STP. What is the emperical formula of this gas? Please help me on how to work out the formula of the gas.

Chemistry - DrBob222, Monday, August 6, 2012 at 9:45pm
1CxHy + O2 ==> 2CO2 + 3H2O

If all are in the gaseous state, volumes are the same as mols; therefore, x must be 2 and y must be 6.

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