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------------------------------------------------ i) How many carbon atoms appear on the right? How many appear on the left?

ii) How many hydrogen atoms appear on the right? How many appear on the left?

iii) How many oxygen atoms appear on the right? How many appear on the left?

The left side of the equation has 2 carbon atoms and 6 hydrogen atoms, while the right side has 2 carbon atoms, 6 hydrogen atoms, and 7 oxygen atoms. To balance the equation, we need to add 6 more oxygen atoms on the left side.

Explanation:

The left side of the equation has 2 carbon atoms and 6 hydrogen atoms. On the right side, there are 2 carbon atoms, 3 water molecules (which contain 6 hydrogen atoms), and a certain number of oxygen atoms represented by the question mark. To balance the equation, we count the oxygen atoms on the right side, which gives us a total of 7 oxygen atoms. Since there is already 1 oxygen atom on the left side, we need 6 more in the form of O₂, which requires three oxygen molecules.

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