Невідомий елемент утворює оксид у якому він двохвалентний. Масова частка цього е...

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Невідомий елемент утворює оксид у якому він двохвалентний. Масова частка цього елемента в оксиді становить 60%. Визначити, який це елемент.
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mrvladimir2

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Ответ: Магній

Объяснение:

Примемо масу оксиду за 100 г, тоді маса елементу становить 60 г, а маса Оксигену 40 г, складаємо пропорцію, виходячи із формули оксиду ЕО:

60/х = 40/16

х=24

Тобто невідомий елемент - це Магній

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Verified answer

Ответ: Магній

exercise 63 translate the sentences into ukrainian using the passive voice 1 d

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Verified answer

Ответ: Магній

exercise 63 translate the sentences into ukrainian using the passive voice 1 d

break) _________________ the rules. Whenever they (go) _________ out with him, t...

want) _______ ___________ anyone to smoke in the house. Doctors (say) ________ 1...

Sam and Fred... to hear about it again. A are not want C are not wanting B do no...

Exercise 56. Change the sentences using the Passive Voice according to the patte...

Exercise 4. Use the right form of the verb 1. She (read) French pretty well. 2. ...

5 change the following sentences to the negative form he knows spanish he do

sposib zhittya formustsyaa pislya prohodzhennya specialnogo navchannyab nepomitno po

Our students ... to spend their holidays in Ukaine. A prefer C is preferring B p...

My sister and her friend ... to study Italian next year A are going C going to B...

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break) _________ the rules. Whenever they (go) _ out with him, t...

want) _ _ anyone to smoke in the house. Doctors (say) ____ 1...