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a) Zn + 2HCl --> ZnCl2 + H2 b) n H 2 = 6 , 1975 24 , 79 = 0 , 25 ( m o l ) PTHH: Zn + 2HCl --> ZnCl2 + H2 0,25<-0,5<---0,25<--0,25 => mZn = 0,25.65 = 16,25 (g) c) mZnCl2 = 0,25.136 = 34 (g)

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Nowadays, a lot of important inventions (1- carry out) are carried out by scientists (2- work) working for large industrial firms. However, there (3- be) are still opporunities for other people (4- invent) to invent various things. In Britain, there is a weekly TV program which (5- attempt) attempts to show all the devices which people (6- invent) have invented recently. The people (7- organize) organizing the program receive information about 700 inventions per year. New ideas can (8- develop) be developed by private inventors. However, it is important (9- consider) to consider these questions: Will it work? Will it (10- want) be wanted ? Is it new?

Nowadays, a lot of important inventions (1- carry out) are carried out by scientists (2- work) working for large industrial firms. However, there (3- be) are still opporunities for other people (4- invent) to invent various things. In Britain, there is a weekly TV program which (5- attempt) attempts to show all the devices which people (6- invent) have invented recently. The people (7- organize) organizing the program receive information about 700 inventions per year. New ideas can (8- develop) be developed by private inventors. However, it is important (9- consider) to consider these questions: Will it work? Will it (10- want) be wanted ? Is it new?

1. A. looked B. watched C. carried D. stopped

2. A. study B. success C. surprise D. sugar

3. A. unite B. underline C. university D. uniform

4. A. danger B. angry C. language D. passage

5. A. character B. children C. teacher D. change

1. A. looked B. watched C. carried D. stopped

2. A. study B. success C. surprise D. sugar

3. A. unite B. underline C. university D. uniform

4. A. danger B. angry C. language D. passage

5. A. character B. children C. teacher D. change

1. A. looked B. watched C. carried D. stopped

2. A. study B. success C. surprise D. sugar

3. A. unite B. underline C. university D. uniform

4. A. danger B. angry C. language D. passage

5. A. character B. children C. teacher D. change