TEST 1. Match the words.Составьте словосочетания. (Пишите кратко)
1) traffic A crossing
2) parking B warden
3) yellow C sign
4) zebra D lines
6) seat E car driver
7) bicycle F belt
8) racing G helmet
2. Fill in the correct word.Вставить слова в предложения. (Пишите только ответ)
watch road plane boat bike car lights left handgrips kerb
1. This man is a pilot. He can fly a ___.
2. Use the when there are no free seats on the bus.
3. My little sister can’t ride a ___ yet.
4. His brother is very young. He can’t drive a ___.
5. Don’t run from the pavement onto the ___.
6. Can your father sail a .
7. Always stop at the traffic when it’s red.
8. Turn ___ into Apple street.
9. There’s a car coming. out!
10. Stand on the pavement near the .
3. Complete the Road Safety Instructions with the correct verb. Дополните дорожные инструкция глаголами. (Пишите только ответ)
1. When on the street, both ways before crossing the road.
2. When on the bus, don’t to the driver.
3. When going to school, on the pavement.
4. When you ride a bike, a bicycle helmet.
5. When in the car, don’t out of the window.
4. Choose the correct preposition (on, by, in, from, at)
1. Be careful when you cross the street __ foot.
4. It’s safe to travel __ train.
5. It’s expensive to travel __ plane.
5. Find the correct response to each sentence.
1. Is there a cinema near here? A Yes, it’s next to the chemist’s.
2. Is it far? B Don’t mention it.
3. Do you know where the bank is? C Not really.
4. Do I turn right at the traffic lights? D Yes. There is a nice one on High Street.
5. Thank you very much. E No, you turn left. Look at the sign.
NaHSO4 + NaOH =Na2SO4 +H2O
m(NaOH)=0.1*144*1.11=15,984г
n(NaOH)=15,984г/40г/моль=0,3996моль
Количество NaHSO4 тоже 0,3996моль
m(NaHSO4) =0,3996моль * 120г/моль= 47,952г
и это получается 40% (если не сульфат 60% - значит гидросульфат40% )
Значит масса смеси - 47,952г/0,4=119,88г - а масса сульфата в свою очередь 119,88г-47,952г=71,928г
NaHSO4+Ba(OH)2=BaSO4+NaOh+h2O
n(BaSO4) =0,3996моль
m(BaSO4) =0,3996моль*233.43 г/моль=93,28г
Na2SO4+Ba(OH)2=BaSO4+2NaOН
n(BaSO4) =n(Na2SO4)=71,928г/142г/моль=0,5моль
m(BaSO4)=0,5моль*233.43 г/моль=116.7г
m(BaSO4) общая =116.7г+93,28г=209.9г =210г
ответ подозрительный тк сказано округлить до десятых , а получается практически 210