Final answer:
Without the balanced chemical equation and additional context for the reaction involving C₂O₄, it's not possible to accurately determine the moles of C₂O₄ in the original solution.
Step-by-step explanation:
To determine how many moles of C₂O₄ were present in the original solution, we would need the balanced chemical equation and the context of the reaction, which unfortunately has not been provided in the question. The information given mixes various chemical reactions and substances (like C₂H₆O, CO₂, and H₂O) but does not specify the reaction involving C₂O₄ directly. In general, to find the number of moles of a substance in a solution, you can use stoichiometry principles, which involves using molar ratios from a balanced chemical equation related to the reaction. This requires knowledge of the quantities of other compounds in the reaction and their stoichiometric relationships to C₂O₄.
In order to determine the number of moles of C₂O₄ present in the original solution, we need to use the information provided. The ratio in the chemical equation tells us that there are twice as many C atoms in one C₂O₄ molecule. So, if we know the number of moles of C atoms, we can double that to find the number of moles of C₂O₄.
Let's say we have 2 moles of C atoms in the original solution. Since there are twice as many C atoms in one C₂O₄ molecule, we can double the number of moles of C atoms to find the number of moles of C₂O₄. So, in this case, there would be 4 moles of C₂O₄ in the original solution.