3.1 г фосфора сожгли.Полученный оксид растворили в 150 г воды. Определить массовую долю полученной кислоты в растворе.

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the Best Holidays in parutino
An and Dan were on holidays in parutino with their friends.it was the sunniest day,sothey decided to go and play on the beach.They were very excited,so they ran all the way there.
At the beach,theyunpacked their things."Let`s play volleyball!
Dan said
They got out a ball and started to play.Alex hit the ball so high that it seemed to go behind the clouds.the children could haedly notice what was under their feet.as steve was playing,he suddenly jumped on something sharp and hurt his right foot.He had to sit downon the hot sand and to examine his foot.
What has happened with you?Ann asked and came closer to the boy.
The children stopped playing.
Why have I hurt my leg?steve wondered.I see nothing here .This place is famos for ancient Greek treasures,Dan explained.People often find old things here.Let`s dig the sand and look carefully. Children started to dig and in a few minutes they couldn`t believe their eyes.They found a small marble thing! Let`s take it to the local museu,Ann said.The man at the museum was very pleased.This is the most amazing thing we have found this season! It is more then two thousand years old.The next day,the local newspaper interviewed the children about their wonderful find.They felt very proud and Steve even forgot about his foot.These are the best holidays we have ever had,they said.

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