Предмет: Химия, автор: romanovo60

формулNa2OH
а едкого натрия

Ответы

Автор ответа: lana8300

0

Mr(NaOH) = Ar(Na) + Ar(O) + Ar(H);

Mr(NaOH) = 23 + 16 + 1 = 40 вроде она

Предыдущий вопрос

Следующий вопрос

Интересные вопросы

Предмет: Математика, автор: Reybant84

Реши примеры
93 -4*7=
81 - 8 • 3:4=
48 + 24 : 4 =
21:7 +3*9=
5•7+ 5 • 3=
8 • 2 + 8• 3 =
4*9 +2*9=
32:8*9=

6 лет назад

Предмет: Английский язык, автор: Gggjkhh

Ex. 4Combine the two sentences into one by introducing the Present Perfect Continuous.

Example: It started raining last Sunday. It is still raining. – Ithas been rainingsince last Sunday.

1. Kevin is studying. He began studying two hours ago. 2. My family and I moved to Canada in 1978. We are still living in Canada. 3. Our tourist group began to travel in the Crimea a week ago. We’re still traveling in the mountains. 4. In 1990 Dories went to Helsinki to teach children English. She is still teaching them. 5. the guest from room 1207 started bathing at 7 o’clock. It’s 8 o’clock, and he’s still bathing. 6. Mary’s dream is to make a tour round the United States. Two years have passed but her dream hasn’t come true yet. So Mary is still looking forward to it. 7. The college lecturers were sent to study at Pace University eight months ago. They are still studying there. 8. Ann is looking for a job. She began looking six months ago. 9. George is working in Cardiff. He started working there on 22 March. 10. Harry began working out a business plan on Monday this week. He is still working at it. 11. They’re discussing the terms of the treaty. They began discussing them at noon. 12. According to the contract the plant started delivering cement to our construction site three years ago. It is still delivering it.

6 лет назад

Предмет: Қазақ тiлi, автор: cencovaalina49

Составьте текст по этим картинкам на казахском. Срочно!!!

6 лет назад

Предмет: Литература, автор: amanov001

моя любимая книга путь абая сочинение

9 лет назад

Предмет: Математика, автор: милана177

помогите ришить [у+5]=3

9 лет назад