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Сколько грамм гидроксид лития можно получить при взаимодействие 22 грамм лития с водой
Ответы 1
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22г хг2Li + 2H2O = 2LiOH + H27г/моль 24г/моль22 г : 7 г/моль *2 = х г : 24 г/моль *2х= (22г*2*24г/моль) : (2*7г/моль)х= 75,4 г.
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Автор:
zane66 - 6 лет назад
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1. Match the words and phrases with their definitions.
1. Asylum seeker
2. emigrant
3. displaced person
4. immigrant
5. refugee
6. fugitive
a) someone who leaves their home to escape from war , persecution or natural disaster
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d) someone who arrives in a country and wants to live there
e) someone who has committed a crime and is hiding from the police
f) Someone who arrives in another country seeking protection because they are in danger
2. Read and complete the text with these words.
(starvation , potato , fungus , landowners , disease , poverty)
At the beginning of the 19th century , ireland was part of the United Kingdom and was one of the poorest regions in Europe. The land was controlled by a few (1) ... with enormous estates and peasant families rented small areas of land where they cultivated vegetables at a subsistence level. Many people emigrated to look for a better life for themselves and to escape from (2) ... . By the 1840s, irish peasants had come to rely on just one vegetable, the (3) ... for food. The potato is rich in nutrients and people can remain healthy on a diet almost exclusively of potatoes. When a (4) ... caused by (5) ... destroyed the potato crop in 1845 , millions of people had nothing to eat. It was a disaster and conditions were made worse by the policies of the British government which ruled ireland at that time. The crisis continued through the 1840s and over a million people died from (6) ... or disease. From a population of about 8 million , over 1 million people emigrated to North America.-
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