Вопрос школьника по предмету Химия
Определите в каких парах химических элементов число нейтронов в ядре атома одного из элементов вдвое больше
Ответ учителя по предмету Химия
литий-кислород, бериллий-неон, бор-магний, углерод-магний, азот-алюминий, кислород-фосфор
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1. If we don’t work harder, we ( pass) the exam.
2. If the students (not be) late for the exam, they would have passed.
3. If the weather (not be) so cold, we would have gone to the beach.
4. If she had her laptop with her, she (email) me.
5. If she doesn’t go to the meeting, I (not go) either.
6. If the baby (sleep) better last night, I wouldn’t have been so tired.
7. If the teacher (give) us lots of homework this weekend, I won’t be happy.
8. If Lucy had enough time, she ( travel) more.
9. If we (not be) so tired, we would go out.
10. If you (buy) the present, I’ll wrap it up.
А)Жиры
Б)Углеводы
В)ДНК
Г)Белки
1) Fe + CuCl2
2) Fe2 O3 + HCl
3)Fe (OH)2 + HCl
4) Fe + MgCl2
5) BaCl2 + FeSO4
И нужно составить уравнение реакций