why does my brain feel emotions if it is a material object?

Why not ask the opposite question: why wouldn't we? How can you be sure a complex computer wouldn't also experience things too?

What we call emotion is something we have been trained to perceive. That is to say it's a habit. You had to learn how to recognize a situation, what to call it, and how to act in response. By taking acting classes you can learn to act differently and replace the old habit with another habit of your choosing, or a range of behaviors subject to your judgment.

The only actual chemical responses in the brain are fear and pleasure.

philosophy 101: what came first, the brain, or the mind?

Personally I think the brain came first, the mind is simply a 'human' projection of the more core functions of the brain.

Can the mind exist without the brain? Most likely not.

I'm not religious, but saying consciousness is generated from material chemical interactions, since in reality there is no such thing as "material" separate particles. Don't believe me, then study quantum physics. And then study Buddhism. Very similar in their descriptions of "reality".

Emotion is very simple, triggered by chemicals in your brain. I think what you are trying to describe is consciousness, being aware of yourself. That, we don't know much about, but we are getting there.

In 25 words or less?

Some answers require that you get ambitious and read a book.

"Why does my brain feel emotions if it is a material object?" - not too bright, are you? Home-schooled?

Wrong section, this should be asked in neurology/neuroscience.