October 2018 1 41 Report
1. Korzystając z wykresu rozpuszczalności substancji, oblicz stężenie procentowe nasyconego roztworu chlorku amonu w temperaturze 50 stopni. 2. Oblicz stężenie procentowe roztworu kwasu solnego otrzymanego w wyniku rozpuszczenia 30 g chlorowodoru w 170 g H2O. 3. Z 5 kg 8-procentowego roztworu cukru odparowano 1000 g wody. Jakie jest stężenie procentowe otrzymanego roztworu? 4. Korzystając z wykresu rozpuszczalności substancji uzupełnij zdania : a) W 100 g wody w temperaturze 70 stopni znajduje się .... g azotanu(V)potasu. b) Jest to roztwór ........ c) Jeśli roztwór ogrzejemy do 80 stopni, to otrzymamy roztwór ...... d)Jeśli roztwór składający się ze 100g wody i 110 azotanu(V)potasu oziębimy z 60 stopni do 40 stopni to .......... ;)
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Read the text and circle the correct answer : a, b, c or d.THE WORLD WIDE WEBEverybody knows the World Wide Web, but who first got idea ? The .......... is an Englishman called Tim Berners-Lee.Tim Berners Lee ................ at Oxford University until 1976, and while he was there he built his first computer from bits and pieces and an old television ............................ . After he did one or two ..................... in England, he went to work in Switzerland and in 1980 he got an idea for a computer program to organise his notes. Then he throught that it would be a really good idea if he could ....................... at things on other people's ........................... . He designed a system called HTML, which allows people to write pages and put them on a web on the internet. In 1991, 11 years ................ his first idea for a program, the World Wide Web was born.From that moment on, the Web and the Internet grew together very quickly. The number of Internet users ................... 1991 and 1996 jumped from 600,000 to 40 ......................... ! Another amazing thing about the Web is that is free. Berners-Lee did not become a rich man with his......... because he always wanted it to be something free for everybody.Berners-Lee is now a Professor at Massachusetts Institute of Technology in the USA. He continues to work with the World Wide Web. 1. a idea b answer c name d question2. a studied b went c wanted d did3. a film b set c programme d channel4. a televisions b jobs c works d companies5. a look b see c read d listen6. a books b webs c computers d televisions7. a before b when c after d until8. a as b to c from d between9. a milion b thousand c users d more10. a money b discovery c Internet d invitetionProszę o szybką pomoc, ponieważ nie mam czasu tego zrobic.Z góry dziękuję (;
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