Предмет: Химия, автор: davidara

К 160 г 5% р-ра HNO3 добавим 20 г H2O. Определите массовую долю азотной к-ты в полученном р-ре

Ответы

Автор ответа: karolina1978
0
1) 160*0,5=80 г масса кислоты в растворе
2)160+20=180 г -масса всего раствора
3)80/180*100%=44,4%
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Change the following statements into the reported speech:

“I must go home to make dinner”, he said.

…………………………………………………………………………………………………………………………………………………………

“They haven’t been waiting long”, said Julia.

………………………………………………………………………………………………………………………………………………………..

“We visited her this morning” they said.

…………………………………………………………………………………………………………………………………………………………

“We will tell them the news on Saturday”, she said.

…………………………………………………………………………………………………………………………………………………………

“I like swimming, dancing and playing tennis”, he said.

…………………………………………………………………………………………………………………………………………………………

“Jenny can’t speak any foreign languages”, said Marco.

…………………………………………………………………………………………………………………………………………………………

“I will phone her today”, he said.

…………………………………………………………………………………………………………………………………………………………

8. “Stephen is bringing some records to the party tomorrow”, she said.

…………………………………………………………………………………………………………………………………………………………

9. “They didn’t come here three months ago”, he said.

…………………………………………………………………………………………………………………………………………………………10. “Tomorrow at five o’clock I will be sitting on a train to Glasgow”, he said.

…………………………………………………………………………………………………………………………………………………………

11. “I saw Maria at the supermarket yesterday”, said Carlos.

…………………………………………………………………………………………………………………………………………………………12. “We have lived here for 5 years”, they said.

…………………………………………………………………………………………………………………………………………………………13. “I am feeling tired now”, said David.

………………………………………………………………………………………………………………………………………………………..

14. “We are going to be a bit late next Monday”, said their friends.

………………………………………………………………………………………………………………………………………………………..

15. “The match will take place next week”, said they.

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