Предмет: Химия, автор: krujanivskyj031209

напишіть рівняння хімічних реакцій та урівняйте їх Ca+O2=CaO. срочно пжпжп​

Ответы

Автор ответа: kataonisuk144
0

2Ca+O2=2CaO начебто так

Автор ответа: chiroidbs
0
CaO2
У правій частині виразу не вистачає одного оксигену
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1. Reading

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Joanne Rowling
Joanne Rowling is one of the most famous British writers. People can read her books about Harry Potter in many languages. She was born on the 31-st of July 1965 in Bristol, England. When she was a child, her dream was to be a writer. When she was six, she wrote her first book about a rabbit. She was a clever student at school, and her favourite school subjects were English and foreign languages. After university she worked as a secretary and then went to Portugal to teach English. She was very busy in the afternoon and in the evening, so she had some free time in the morning to write her books.
Joanna came back to Britain and lived in Edinburgh, Scotland. In 1990 she had an idea about her new book about a young magician – Harry Potter. Her first book was a great success. Now there are seven Harry Potter books.

Выбери нужный вариант.

1. Joanna Rowling is a famous … writer
a) American b) British c) Australian
2. People can read her books in …
a) English only b) English and Russian c) many languages
3. She was born in …
a) winter b) summer c) spring
4. When she was a girl, she wanted to …
a) write books b) read books c) buy books
5. Her first book was about ….
a) children b) school c) an animal
6. At school she liked … most of all.
a) Maths b) languages c) Sciences
7. In Portugal she worked as a …
a) teacher b) secretary c) writer
8. She usually wrote her books in the …
a) evening b) afternoon c) morning
9. The idea to write a book about Harry potter came to Joanne Rowling in …
a) England b) Scotland c) Portugal
10. Harry Potter is a young …
a) magician b) inventor c) journalist
7 лет назад