Обчисліть об`ем кисню який потрібний для повного згоряння етилену кількістю речовини 0.2 моль *)помогите плиз

Помогите пожалуйста. Complete the sentences with one of the following words: because, but, first, finally, when, then (2), and (2), suddenly. Last Sunday Frank (I) …………… I went on a bike tour. The weather was clear (2)…………. not very warm. (3)…………… we had a lovely tour round the lake. We couldn't go swimming (4)…………… the water was too cold. (5)…………. we had a picnic in the woods. After that we went on.(6)………………… Frank stopped. "I've lost my 'camera", he said. "Let's go back and look for it". (7)……………. we got back to the lake, we saw a man with the camera. "I've found a camera. Is it yours?", he asked. Frank was glad to get it back. It was a Christmas present from his parents. (8)……… we got on our bikes again (9) ………went up the hill.(10)……….we got to our uncle's house where we wanted to spend the weekend.

Был ли Грегр Замза насекомым??? помогитееее...