Пожалуйста, решите цепочку. 
K -> K20 -> KOH ->K2CO3

И вот еще одна:

KOH -> Cu(OH)2 -> CuO 

Пожалуйста, вставте(где нужно) слова из скобок!

Some children don’t like PE (lessons, courses, hours, championships) at school. But I think it is important to take (place, game, part, course) in PE. PE is a great way to (lead, promote, keep, bring) you fit and healthy even if you don’t like it. (Since, consequently, even, as a result) you may not do any exercise at home, I think it is important that you (make, train, keep, have) PE lessons. Taking (dangerous, regular, balanced, accurate) exercise is necessary. I believe it actually (leads, promotes, masters, causes) to a better lifestyle. The government plans to make children more ( activity, active, inactivity, inactive), because a lot of kids are dangerously (fit, obesity, overweight, slim). Besides, more sports have been introduced at school to help people to learn how to win, (develop, skip, wrest, lose) and be part of the team. I think girls, who want to be slim and look great, will enjoy PE more if they have a lot of (skills, forms, activities, hours) to choose from.

Заполните пропуски в схеме "Союз Литвы и Польши"
1387---Князь Ягайло объявил ________государственной религией Великого княжества Литовского.
1)Назовите причины
2)Последствия для русского населения. 

составьте четверостишие на тему " Прививки важны ,прививки нужны". самим надо составить ) Заранее спасибо)))

Какой отпечаток могла наложить профессия - врача на творчество Чехова??