Выведите формулу одноатомного спирта,если при взаимодействий 4,14г.его с металическим натрием было получено 1,008л.водорода(н.у)

Упр. 195. Раскройте скобки, употребляя глаголы в Past Simple или Past Continuous.

1. I (to feed) my cat with fish yesterday. 2. What you (to do) at four o'clock yesterday? I (to feed) my cat. 3. What your brother (to do) yesterday? He (to play) computer games. 4. I (to begin) repairing my camera at six o'clock yesterday. 5. At five o'clock yesterday Helen (to cook) soup. 6. We (to play) badminton from nine till eleven yesterday. 7. Kate (not to go) for a walk yesterday. She (to write) a composition the whole day yesterday. 8. When your father (to come) home yesterday? He (to come) home at seven o'clock. 9. When my father (to come) home yesterday, my mother (to make) supper. 10. We (not to go) on a tramp last summer. 11. What you (to do) when your sister (to come) home yesterday? 12. You (to have) supper at nine o'clock yesterday? 13. He (not to go) to the shop yesterday. 14. Nick (to go) to bed at ten o'clock yesterday. 15. Rick (to sleep) at eleven o'clock yesterday. 16. When we (to play) in the yard yesterday, it suddenly (to start) raining heavily. 17. I (to see) Mike when he (to cross) the street. 18. He (to begin) repairing his bicycle in the morning yesterday. 19. He (to repair) his bicycle the whole day yesterday. 20. He (to finish) repairing his bicycle in the evening yesterday.

Привлекая свои знания по химии и биологии, объясните, как эти науки влияют на севершенствование сельскохозяйственного производства?