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На воздухе провели реакцию сжигания металла бария.а)Запишите уравнение реакции горения бария.Расставьте коэффициенты. Б)Назовите вещество,полученное в результате реакции горения бария
Ответы 1
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Ответ:
а) Уравнение реакции горения бария:
2Ba + O2 -> 2BaO
б) В результате реакции горения бария утворюється оксид барію (BaO).
Объяснение:
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Автор:
nataliejyog - 1 год назад
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A letter From an English Girl
Dear friends,
I am writing this letter from England. My name is Alice Stewart. I am fourteen. I go to a very large school. It is a girl's school. In our country there are a lot of schools where boys and girls study together, but there are also some boys and some girls' schools.
The teaching staff of our school is very large. We have a headmistress, a deputy head, about thirty teachers and eight hundred pupils. As it is a comprehensive school, there are not only academic subjects, but also accounting, typing, shorthand, nursing and housekeeping. Girls of 11 to 18 attend our school.
We have classes five days a week, Monday to Friday. I get to school at 8.40. We have prayers at 8.50 and start our lessons at 9.30. We have five lessons in the morning: two before break and three after break. After lunch we have two more lessons. But on Mondays we have an extra hour to discuss our form matters with the form mistress. School usually ends at 3.40.
We learn thirteen subjects: English, French, German, Maths, History, Science, Geography, Needlework, Art, Drama, Physical Training, Music and Religious Instructions. Well, enough about me. I'd love to hear about you.
Please, write to me about your school: I'm very interested if the schools in Ukraine differ greatly from our comprehensive school. Do boys and girls study together or in separate schools? What subjects are taught in your school? How many days a week do you go to school? What is your school day like? What is the difference?
I'm looking forward to hearing from you soon.
Yours, AliceListening test _____________________________, 7 th
form
1. Are the sentences true or false?
a) Alice Stewart is thirteen.
b) She studies at a girl's school.
c) She studies the only foreign language at school-English.
d) Alice studies typing and housekeeping at her school.
e) Girls of 7 years old begin to study there.
f) The lessons start at 9.30
g) Alice does not study on Saturday and Sunday.
h) Alice has six lessons every day.
i) Alice has five lessons in the morning.
j) School usually ends at 4.20.
k) Children in Alice’s school can choose the subjects for studing.
l) Alice is interesting in Ukrainian kindergartens.
2.Answer the questions
1. What school does the girl study at?
________________________________________________
2. How many languages does Alice study at school?
____________________________________
3. How many teachers are there in her
school?_________________________________________
4. When do children from Alice’s class have extra hour to discuss our form matters?
__________________________________________________________________
5. How many lessons does Alice have every day?
______________________________________
6. What other subjects except academic do they have?
________________________________________________________________
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Автор:
nasir - 1 год назад
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