How many pi bonds are in ritalin. I counted 4 pi bonds(double bonds), and 18 sigma bonds(single bonds> I want to make sure I didn't miss count anything.

To determine the number of pi bonds in a molecule like Ritalin, you will need to examine its structure and count the double bonds. Ritalin, also known as methylphenidate, has a chemical formula of C14H19NO2.

To count the pi bonds, you should first draw the Lewis structure or find a representation of the molecule. In Ritalin, there is one benzene-like ring system, which contains three double bonds (pi bonds). Additionally, there is one double bond connecting the oxygen atom to the carbon atom. So, you are correct in counting 4 pi bonds (three from the benzene-like ring system and one from the double bond to oxygen).

For counting the sigma bonds (single bonds), you can refer to the Lewis structure or representation of the molecule. In Ritalin, each line connecting two atoms represents a single bond or a sigma bond. Counting the sigma bonds will give you the total number of single bonds present. Based on the chemical formula C14H19NO2, you will count 18 sigma bonds.

In summary, you correctly counted 4 pi bonds and 18 sigma bonds in Ritalin (methylphenidate).