Gaseous ethane will react with gaseous oxygen to produce gaseous carbon dioxide and gaseous water . Suppose 25. g of ethane is mixed with 122. g of oxygen. Calculate the maximum mass of carbon dioxide that could be produced by the chemical reaction. Round your answer to significant digits.

73.48 g

Explanation:

The reaction that takes place is:

We convert the given reactant masses to moles, using their respective molar masses:

0.83 moles of ethane would react completely with (0.83*7/2) 2.9 moles of O₂. There are more O₂ moles than that, so O₂ is the reactant in excess and ethane is the limiting reactant.

We calculate the produced moles of CO₂ using the moles of the limiting reactant:

Finally we convert CO₂ moles to grams, using its molar mass:

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