l. He goes to school every day. He doesn't go to school every day. Does he go to school every day? 2. My sister works here. My sister doesn't work here. Does my sister work here? 3. They eat a lot. They don't eat a lot. Do they eat a lot? 4. We work every day. We don't work every day. Do we work every day? 5. I come from Ukraine. I don't come from Ukraine. Do I come from Ukraine? 6. He comes from Germany. He doesn't come from Germany. Does he come from Germany? 7. They live in the USA. They don't live in the USA. Do they live in the USA? 8. He plays football every day. He doesn't play football every day. Does he play football every day? 9. I visit my parents very often. I don't visit my parents very often. Do I visit my parents very often? 10. His father works at an office. His father doesn't work at an office. Does his father work at an office?
Сколько процентов кислорода в соеденнениях wo3,al2o3
Сколько процентов кислорода в соединений cr2o3
Сколько г соды содержится в 500 мл 0,25 н раствора? 1) 6, 63 2) 4, 52 3) 12, 80 4) 3, 05
Сера при взаимодействии с кислородом 1)является окислителем 2)является восстановителем 3)не изменяет степень окисления
Составьте уравнения реакций, при помощи которых можно получить cuso4, nacl, co2.
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