Có những oxit sau: CaO, Fe2O3, SO3. Oxit nào có thể tác dụng được với:
a) Nước.
b) Axi...
Chemistry, 14.11.2021 21:00 oddoneshenchman
Có những oxit sau: CaO, Fe2O3, SO3. Oxit nào có thể tác dụng được với:
a) Nước.
b) Axit clohiđric.
c) Natri hiđroxit.
Viết các phương trình phản ứng.
Answers: 2
Chemistry, 21.06.2019 12:50
Which phrase best describes the rock's texture? 1.jagged grains 2.coarse grains 3.rounded grains 4.non-banded grains
Answers: 1
Chemistry, 21.06.2019 23:30
Why do you suppose the structural polysaccharide cellulose does not contain branches? why do you suppose the structural polysaccharide cellulose does not contain branches? branches in the molecule would generate side chains that would almost certainly make it difficult to pack the cellulose molecules into globules, thereby decreasing the flexibility and strength of the globules. branches in the molecule would generate side chains that would almost certainly make it difficult to pack the cellulose molecules into microfibrils, thereby increasing the rigidity and strength of the microfibrils. branches in the molecule would generate side chains that would almost certainly make it difficult to pack the cellulose molecules into globules, thereby increasing the flexibility and strength of the globules. branches in the molecule would generate side chains that would almost certainly make it difficult to pack the cellulose molecules into microfibrils, thereby decreasing the rigidity and strength of the microfibrils.
Answers: 1
Chemistry, 22.06.2019 17:10
)benzene and toluene form nearly ideal solutions. consider an equimolar solution of benzene and toluene. at 20 °c the vapour pressures of pure benzene and toluene are 9.9 kpa and 2.9 kpa, respectively. the solution is boiled by reducing the external pressure below the vapour pressure. calculate (i) the pressure when boiling begins, (ii) the composition of each component in the vapour, and (iii) the vapour pressure when only a few drops of liquid remain. assume that the rate of vaporization is low enough for the temperature to remain constant at 20 °c.
Answers: 1
Chemistry, 22.06.2019 20:20
The characteristics of two different types of reactions are shown below: reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of an element. which statement is true about the atoms of the elements that participate in the two reactions? their identity changes in both reaction a and reaction b. their identity changes in reaction a but not in reaction b. their identity changes in reaction b but not in reaction a. their identity remains the same in both reaction a and reaction b.
Answers: 1
Computers and Technology, 15.07.2021 17:30
Computers and Technology, 15.07.2021 17:30
Mathematics, 15.07.2021 17:30
Mathematics, 15.07.2021 17:30
Mathematics, 15.07.2021 17:30
Mathematics, 15.07.2021 17:30
Mathematics, 15.07.2021 17:30
English, 15.07.2021 17:30
Computers and Technology, 15.07.2021 17:30