КЛАСС.
Элементарному составу вещества 72, 41% железа и 27, 59% кислорода соответствует формула 1) FeO 2) Fe2O3 3) Fe3O 4) Fe3O4 Оформить и решить как задачу.
278
279
Ответы на вопрос:
Составьте предложения со словами:
Do archery, miss flight, climb walls, walking, run out of cash, buy souvenirs, get a flat tyre, visit historic sites, try local food, car break down, lose luggage, have your wallet stolen, learn scuba diving.
II. Выберите правильный вариант: Future Simple, to be going to, Present Continuous, Conditionals, Might/Could, will probably, will definitely.
1. The tourists ... wind-surfing to the coast in summer.
a) Are going
b) Will go
c) Go
2. I don’t think we … a quad bike. It’s too dangerous.
a) are driving
b) drive
c) will drive
3. We … tonight.
a) eat
b) will eat
c) are eating
4. My parents … to London in an hour.
a) will fly
b) fly
c) are flying
5. I … to take scuba diving lessons.
a) am going to
b) is going to
c) will
6. If the weather is fine, we … .
a) will sunbathe
b) sunbathe
c) sunbathes
7. If you mix red and white, you … pink.
a) will get
b) gets
c) get
8. There is no news from him. He … still be in the holiday camp.
a) could
b) might
c) may
9. The flight from the USA to Japan will … be expensive.
a) could
b) definitely
c) probably
III. Выбери правильный вариант.
1. How can I help you?
2. What would you like to know?
3. How much does it cost to get in?
4. Can I help you with anything else?
5. What is the best way to get there by car?
a) Just head for Twin Peaks town centre on TE-50 and continue straight.
b) No, I think that’s all, thank you.
c) What are the opening hours?
d) It’ 5$ adults and 2.50$ for children.
e) I’m calling for some information.
Do archery, miss flight, climb walls, walking, run out of cash, buy souvenirs, get a flat tyre, visit historic sites, try local food, car break down, lose luggage, have your wallet stolen, learn scuba diving.
II. Выберите правильный вариант: Future Simple, to be going to, Present Continuous, Conditionals, Might/Could, will probably, will definitely.
1. The tourists ... wind-surfing to the coast in summer.
a) Are going
b) Will go
c) Go
2. I don’t think we … a quad bike. It’s too dangerous.
a) are driving
b) drive
c) will drive
3. We … tonight.
a) eat
b) will eat
c) are eating
4. My parents … to London in an hour.
a) will fly
b) fly
c) are flying
5. I … to take scuba diving lessons.
a) am going to
b) is going to
c) will
6. If the weather is fine, we … .
a) will sunbathe
b) sunbathe
c) sunbathes
7. If you mix red and white, you … pink.
a) will get
b) gets
c) get
8. There is no news from him. He … still be in the holiday camp.
a) could
b) might
c) may
9. The flight from the USA to Japan will … be expensive.
a) could
b) definitely
c) probably
III. Выбери правильный вариант.
1. How can I help you?
2. What would you like to know?
3. How much does it cost to get in?
4. Can I help you with anything else?
5. What is the best way to get there by car?
a) Just head for Twin Peaks town centre on TE-50 and continue straight.
b) No, I think that’s all, thank you.
c) What are the opening hours?
d) It’ 5$ adults and 2.50$ for children.
e) I’m calling for some information.
Дано:
ω(Fe)= 72,41%
ω(O)= 27,59%
Найти:
x, y
x:y= 72,41/M(Fe):27,59/M(O)= 72,41/56:27,59/16= 1,3:1,7= 1:1,3= 3:4
ответ: Fe₃O₄ - железная окалина
Реши свою проблему, спроси otvet5GPT
-
Быстро
Мгновенный ответ на твой вопрос -
Точно
Бот обладает знаниями во всех сферах -
Бесплатно
Задай вопрос и получи ответ бесплатно
Популярно: Химия
-
rizakovaarina12.10.2022 10:14
-
kutirev123p27.06.2023 17:08
-
amir300926.04.2023 18:20
-
ВладимирЛенин120.01.2020 08:47
-
Rimma122328.08.2022 04:16
-
darinaprokopenk10.01.2021 22:48
-
GHTU27.10.2021 10:58
-
ivanapushkin1023.11.2021 10:54
-
hjhjhjhhhhhhh15.07.2022 02:51
-
kotsweg05.05.2023 12:53
Есть вопросы?
-
Как otvet5GPT работает?
otvet5GPT использует большую языковую модель вместе с базой данных GPT для обеспечения высококачественных образовательных результатов. otvet5GPT действует как доступный академический ресурс вне класса. -
Сколько это стоит?
Проект находиться на стадии тестирования и все услуги бесплатны. -
Могу ли я использовать otvet5GPT в школе?
Конечно! Нейросеть может помочь вам делать конспекты лекций, придумывать идеи в классе и многое другое! -
В чем отличия от ChatGPT?
otvet5GPT черпает академические источники из собственной базы данных и предназначен специально для студентов. otvet5GPT также адаптируется к вашему стилю письма, предоставляя ряд образовательных инструментов, предназначенных для улучшения обучения.