Terephthoyl chloride and ethylene glycol react by polymerisation to produce a polymer called poly(ethylene terephthalate), commonly known as PET. PET is used to make soft...
Terephthoyl chloride and ethylene glycol react by polymerisation to produce a polymer called poly(ethylene terephthalate), commonly known as PET. PET is used to make soft...
Methane, CH4, is the major constituent of natural gas.
(a) Draw a dot-and cross-diagram to show how the outer shell electrons are arranged in methane.
(b) At a...
3 . Methane, CH4, is the major constituent of natural gas.
(a) Draw a dot-and cross-diagram to show how the outer shell electrons are arranged in methane.
...
9. Cement is made by heating clay with crushed calcium carbonate. During this process, the calcium carbonate is first converted to calcium oxide.
(a) Suggest why calcium...
Although certain bacteria in the soil convert nitrogen gas into nitrates, other bacteria convert nitrogen into ammonium salts. The ionic equation for this second reaction is
N2...
Although certain bacteria in the soil convert nitrogen gas into nitrates, other bacteria convert nitrogen into ammonium salts. The ionic equation for this second reaction is
N2...