Классы:
1)Кислоты - HNO3; H2SiO3; H2SO3; H2CO3; HBr.
2)Соли - Al2(SO4)3; NaCl; Li2S.
3)Основания - NaOH; Al(OH)3 ; Mg(OH)2; Fe(OH)3.
4)Оксиды - Na2O; SO2; K2O; SO3; SiO2.
NaOH - гидроксид натрия
Na2O - оксид натрия
HNO3 - азотная кислота
H2SiO3 - кремниевая кислота
Al(OH)3 - гидроксид алюминия
H2SO3 - сернистая кислота
Al2(SO4)3 - сульфат алюминия
H2CO3 - угольная кислота
Mg(OH)2 - гидроксид магния
SO2 - оксид серы(IV)
NaCl - хлорид натрия
HBr - бромоводородная кислота
SO3 - оксид серы(VI)
K2O - оксид калия
Fe(OH)3 - гидроксид железа(III)
Li2S - сульфид лития
SiO2 - оксид кремния(IV)/диоксид кремния
Hi! My name is Jack. Visiting a river site is one of my most favourite things to do during the
summertime. The lakes I visited, was located about fifty kilometres away from my
hometown in the countryside. It was great! There were a number of restaurants and café. I
friends stayed at a hotel which was very close to the waterfalls. There were also
many beautiful mountains trees and waterfalls
I also walked on the sandy bank of the
river and i was surprised when my friends took a fish-rod for fishing. I swam every day.
Also we climbed the mountains It was a wonderful holiday.
and my
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