The present continuous and the present simple tenseGala Timofeeva
The document discusses the present continuous and present simple tenses in English. It provides examples of verbs that can be used with both tenses, such as "play," as well as verbs that are only used with the present simple tense, such as "hate," "love," and "like." It then provides exercises for students to practice forming sentences using verbs in the present continuous and present simple correctly based on pictures.
This document provides instruction on using adverbs of time with the present perfect tense in English. It includes examples of different adverbs used with the present perfect, such as "already", "just", "never", and "ever". Tables are presented showing the affirmative and negative forms of the present perfect for regular and irregular verbs. Practice exercises are included for students to test their understanding.
The present continuous and the present simple tenseGala Timofeeva
The document discusses the present continuous and present simple tenses in English. It provides examples of verbs that can be used with both tenses, such as "play," as well as verbs that are only used with the present simple tense, such as "hate," "love," and "see." It then provides exercises for students to practice using verbs in sentences with the present continuous and present simple correctly based on meaning.
The document contains information about the positive, comparative, and superlative degrees of adjectives in English. It lists many common adjectives and their forms in the comparative and superlative degrees, such as long/longer/longest and big/bigger/biggest. It also notes some exceptions and provides examples of using the degrees of adjectives to compare people, animals, objects, and situations.
4. 1.
Какое количество молекул йода мы
мажем на разбитую коленку, если общее
число молекул составляет 38.1023 молекул?
2.
Какое количество молекул сахарного
песка мы кладем в чай, если общее число
молекул составляет 480.1023 молекул?
3.Какое
количество атомов углерода
содержится в бриллианте, если общее
число молекул составляет 180.1023 атомов?
5. 1.Известно,
что в одном гвозде содержится
5,5моль железа. Сколько атомов железа
содержится в этом гвозде?
2.Однапорция дрожжей содержит 10,5
моль вещества. Сколько молекул дрожжей
содержится в этой порции?
3.
Сколько молекул воды содержится в
стакане, если туда налили 20 моль воды?
6. Молярная масса – масса вещества, взятого в
количестве 1 моль.
Численное значение молярной массы равно
значению относительной или молекулярной
массе.
Единица измерения - г/моль или кг/моль
Аr (S) = 32 = > M(S)= 32г/моль
Mr(HCl) = 36,5 = > M(HCl) = 36,5г/моль
6.1023 атомов 6.1023 молекул 6.1023 молекул 6.1023 атомов
Fe O2 SO2 Al
M(Fe)=56г/моль M(O2)=32г/моль M(SO2)=64г/моль M(Al)=27г/моль
8. Вычислить молярную массу молекулы
фосфорной кислоты H3PO4.
Вычислите массу 5 моль фосфорной кислоты.
Какое количество вещества содержится в 540
граммах воды?
Какова масса золота, взятого в количестве
вещества 0,7 моль?
