Not unless there was already a contractual agreement.
no
No, a minor can not sue their own parent in the state of Iowa. A child can file for emancipation from a parent in the state.
no
Not technically. Child support is for a custodial parent to support the child. Check your state laws.
Yes
Yes a child can sue a parent for unpaid child support if there was a child support order.
Is this a trick question? If the child is legally an adult (and therefore 'emancipated') then there is no "custodial" parent.
No, the child can not. The other parent could before the child was an adult. The money goes to the parent to use for the child and not directly to the child.
Only if the obligee parent releases the claim or is deceased.
no
Unfortunently you can not in our society.
Absolutely not; the child doesn't owe the parent(s) anything.