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Обчислiть масовi частки елементiв у сполуцi,що має Al203
Ответы 2
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Mr(Al2O3)=2*27+3*16=102W(Al)=54/102=0.5294=52.94%W(O)=48/102=0.4706=47.06%
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Автор:
trinityhoward - 4 года назад
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Mr(Al2O3)=2*27+3*16=102W(Al)=54/102=0.5294=52.94%W(O)=48/102=0.4706=47.06%
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Автор:
checkerswillis - 4 года назад
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Помогите перевести текст ( Учебник " spotlight" 4 класс страница 154)
the bird with one wing
Once upon a time, thee was a baby bird with
only one wing. The baby bird coujd not fly. One
day the other birds said: " It is vere cold
here," and they all flew away. The bird with
one wing was very sad. " I can't fly," it sait,
" and I can't live here all alone! What should I
do?" Just then the little bird saw some squirrels.
" Please can Ilive with you?" it asked. " Can you
crack nuts for us?" asked the squirreis. " No," said the
bird. " Then you cannot live with us," they answered. The poor little
bird walked on until it came to a fox. "Please cfn i live with you? said the bird.
" Can you catch chickens?" said the fox. "No," said the bird. " Then you?" said the bird. " Then you cannot
live with me," said the fox. So the bird walked on and on, feeling very sad.
Suddenly the little bird saw a treehouse. The bird knocked on the door and Mrs
Rabbit opened. " Please," said the bird with one wing, " I'm all alone. please can
I live with?" " What can you do?" said Mrs Rabbit. " I can clean your house,"
said the bird. " Come in, then," said Mrs Rabbit. " that is just want we want!" So
the bird with one wing cleaned Mr and Mrs Rabbit's house and was very happy and
warm in the treehouse. How, every winter when the other birds fly away to
warmer places, the little bird stays with Mr and Mrs Rabbit in the theehouse
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