
xInterpretation:
The gas (CH4 or C2H6) that produces 1.80 g of water when 1.00 -g of this gas is combusted in excess O2 has to be determined. Assuming complete combustion.
Concept Introduction:
➣ The combustion reaction is a reaction where the oxygen reacts with a compound formed by carbon and hydrogen. Its products are carbon dioxide and water when the combustion is complete.
➣ The molecular weight (MW) can be defined in the following way,
Where ni is the number of atoms of element i that form the molecule and Ai is the atomic weight of element i.
➣ The
➣ The molar ratio can be used to relate:
- The moles of product formed from of certain moles of reactant.
- The moles of reactant needed to form certain moles of a product.
- The moles of a reactant needed to react with certain moles of a second reactant.

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Chapter 4 Solutions
Chemistry for Engineering Students
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