Составьте уравнения реакций горения следующих веществ в кислороде:алюминия,магния,водорода,цинка,кальция,железа(I I I),фосфора (V),серы(VI),(в скобках указана валентность данного элемента в полученном оксиде)Назовите образующие вещ-ва!

Say the same differently.Use the new words.

Example: Jenny buys all the interesting postcards she can find. It is her hobby. Jenny collects postcards

1)John spends a lot of time learning geography. 2)These two countries have very good contacts.3) The science that studies how living things live in relation to each other and their environment is one of the most important sciences nowadays. 4) These days people work a lot on computers. 5) People should think a lot about the surroundings in whish they live. 6) Mr Robinson decided to put a high wall around the castle.7) Why is it important for children to eat good food?

8)What is the number of people who live in London?

9) Julia has got a lot of good books at home.

10) I`d like to ask you some questions.

Решите уравнения(с решением)

1)3,x-4=4,8-x

2)2x+7=x+5,5

3)5-3x=2x-8

Пожалуйста!!!  

Словообразовательный разбор слова прапрадед

22м-50дм   см=290дм))