Как по экспериментальным данным можно определить молекулярную и структурную формулы этилена?

We went to the movies at ten o'clock. The film is about two hours and continued to run out in 12. We came home late, and Anna remained with us. On Sunday we decided to go out of town. The weather was good, we had called out of town three hours. We came home at five o'clock in the evening. After lunch we went to visit friends of Anna. We wanted to go with them for a walk in the evening, but then decided to go to the theater.