There is no scene 11. I may be able to find what you are talking about though. I love me some Macbeth
Answer:
Hamlet doesn't kill Claudius at this point because he believes that Claudius is praying. He says that killing the king NOW would be "hire and salary, not revenge!" He simply cannot send Claudius to heaven, where he would surely go were he killed just after praying and purging his sins.
Explanation:
When Gregor died, he was transformed into a big insect. From then on, the story continues. Gregor had not realized that he was dead. They were so dependent on him. His passing had changed the way they looked at life. They were able to get jobs and the same time learned to use money wisely. They were able to save some of Gregor's saving and from their father's failed business.