Вопрос школьника по предмету Химия
Выбери ряд высших оксидов, в котором последовательно ослабевают их основные свойства:
GeO2 CO2 SiO2
Li2O K2O Cs2O
Li2O BeO CO2
MgO Cl2O7 SiO3
Ответ учителя по предмету Химия
Li2O > BeO > CO2
Основные свойства соединений с ростом порядкового номера усиливаются в группах и ослабевают в периодах.
Похожие вопросы от пользователей
A/ In each pair of sentences find the sentence containing The Nominative with the Infinitive = Complex Subject and that containing The Objective with the Infinitive = Complex Object.
a. We believe him to finish the work tomorrow,
b. He is believed to finish the work tomorrow.
2. a. We ordered the timber to be delivered within ten days,
b. The timber is ordered to be delivered within ten days.
3. a. The drainage system is expected to be completed next month,
b. We expect the drainage system to be completed next month.
In each pair of sentences state the form of the infinitive and the type of the Infinitive Construction used in them. State the difference in their meaning.
1. a. The house seems to have been damaged by the earthquake,
b. Tile house is likely to be damaged in case of the earthquake.
2. a. The mansion is likely to have been built many centuries ago.
b. The mansion is sure to be demolished the next century.
А) дождь
В)снег
С)град
Д)все перечисленные
Ответы
1)5
2)15
3)8
4)10