Предмет: Химия, автор: raikoinna634

обчисліть та позначте відносну молекулярну масу калій сульфіду K2S

Ответы

Автор ответа: jenka544

8

Ответ:

$M_{r}(K_{2}S)=39+39+32=110.$

Объяснение:

Чтобы вычислить относительную молекулярную массу,необходимо сложить все атомные массы элементов в соединении.

Автор ответа: geraskoana3

1

Ответ:

Mr(K2S)=2*39+32=110

Объяснение:

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Английский язык, автор: lesha123pro

Final test 7 form Khotsky school
1.What______ last weekend?
A did you do B are you do C have you done D you did
2.What _____tomorrow night?
A are you doing B do you do C you do D are you do
3. It`s the most interesting film ______!
AI saw B I ever saw C I`ve ever seen D I`m ever seeing
4.If you_____ him, he`ll give you a piece of advice.
A write B will write C are writing D have written
5.We ____in the sun all day yesterday.
A lay B had lain C were laying D had been laying
6.They`ll move to France when their baby________
A will born B is being born C is born D would be born
7. She speaks English ______than me.
A more better B better C more well D so better
8. Can you tell me where________?
A the post office is B is the post office C the post office D post office
9.Look at the brochure. The show _____at 8.30
A starts B is starting C will start D start
10. If we ______we`ll catch the bus.
A to hurry B hurry C are hurry D will hurry
11.We`ve got a sofa_______ is also a bed.
A which B who C where D-
12.It`s cold.- I_____ the window.
A `ll close B am going to close C would close D am closing
13.What were you doing when you______ the text?
A were getting B got C get D getting

14.What time _____ you go to bed last night?
A were B had C went D did
15. I _____ my work at last! Now I can have a rest.
A would finish B finished C have finished D had finished
16. Jenny is only eighteen but she has ______ written two plays.
A yet B ever C never D already
17.Ouch! I`ve ____ cut my finger.
A already B yet C just D ever
18.I ____ you later if you like.
A I am helping B `ll help C `m going to help D help
19.If we _____we`ll catch the bus
A to hurry B hurry C are hurrying D will hurry
20.Everything`s free, so you ___bring any money.
A have to B can`t C needn`t D must
21.It _____ in the north tomorrow.
A will be raining B will rain C rains D is raining
22.I ___ to go out today.
A I`m not wanting B don`t want C not want D haven`t wanted
23.He told me that there _____ an accident the day before.
A has been B was C had been D is
24.They ______ the computer by Wednesday.
A had repaired B were repairing C had been repairing D repaired
ПОМОГИТЕ УМОЛЯЮ

5 лет назад

Предмет: Математика, автор: vladgalahov1146

Помогите пожалуйста!!!!!!!

5 лет назад

Предмет: Обществознание, автор: perchik82

Верное суждение или нет
Конституция - закон прямого действия, потому что для защиты прав гражданину не нужно обращаться к другому закону

5 лет назад

Предмет: Физика, автор: AnnaSofia37

Действительно ли обручальное кольцо объемом 0.5 см3 и массой 8 грамм может быть золотым? Обоснуйте свой ответ.

Помогите плииииз!!!

Еще одна задачка.
Сколько понадобится железнодорожных цистерн для перевозки 1000 тонн нефти, если вместимость каждой цистерны 50 см3?

8 лет назад

Предмет: Геометрия, автор: Jessika51

Помогите, пожалуйста, решить 9 и 10 задание

8 лет назад