Dam you are an ignorant piece of shit.
Your "response" to the fact that science does not have all answers is to point out that there exist questions that science can answer.
Can you not see what sad kind of response that is? (All X are false because for one X it is true is a fallacy)
Tell me: what happens after death? Why does there exist anything? Is there meaning in life?
Do you honestly think science has clear cut answers to this all? You have to be moronic to think that.
The rest of that is even sadder, you have to be a miserable person to believe that everything about life is physical.
What is love? And since you are going to answer "chemicals in your brain" point me to one scientific reason why killing yourself is wrong, since "it is all just chemicals in my brain" why would it matter if you made them stop?
I once also though exactly like you did, but that was when I going through my "edgy" phase at about 16. I seriously hope that you can grow out of it and realize that there are things in the world you can not comprehend and that calling everything meaningless only makes you hate yourself.