How many rings does an alkane have if its formula is c8h12?

3 rings.

Explanation:

Hello,

In this case, there are two possible ways to bear out that this alkane has two rings.

- Drawing: on the attached document, you will see the suitable structural formula for such alkane.

- By computing the degree of unsaturation: one applies the following formula for the degree of unsaturation that is also related with the number of rings no double or triple bonds are present , whereas accounts for the number of carbon atoms and for the number of hydrogen atoms:

Best regards.

2fe + 3h2so4 -> fe2(so4)3 + 3h2

it is necessary to balance equations in order to get the proper amount of reactants as well as products in order not to make a miscalculation.

you cannot change the subscripts as that would change the substance itself. for instance, diatomic elements such as h2 only have the subscript two when a gas. another example would be so4, if you were to change the subscript, the element would no longer be sulfate.

we change the coefficients instead as that only changes the number of molecules rather than the substance itself.

hope this !