Analysing the raw block Hex file but I can not find the expected information My goal is to understand better, how transactions and blocks are built raw. For that, I found several questions and answer here on StackExchange, but the best for me was this post:
Download single and specific block for study purposes

Then I followed the information in this answer and had a look at this block.

Raw HEX file of the block here.

Now my question is:
Why do I not find transaction hash in the raw hex file? 

When I am looking for a specific transaction hash (e.g. "909374f0cc117...) I do not find it. I thought each transaction is added to the block. Maybe not the hash of the transaction?
Each transaction is indeed added to the block, but only its contents, the hash is then derived by hashing the transaction data twice with SHA-256.

This image explains how a block is laid out in hex.