When it comes to chemistry questions, chemistry questions 1 Why?

Bounty Points: 5 - 14 days and 23 hours until the end of the question.

Under the same conditions, the volume is the same. Yes, yes.

1molCO2 and 1molco contain the same number of molecules and occupy the same volume.

The volume of a mixture of 1 molCO2 and CO is about 1 mol of CO2 under standard conditions.

1)hac <=h+ +ac-

ka==[h+][ac-] hac]--hac]==h+][ac-] ka(ionization process).

2) AC- +H2O <=HAC + OH-Kh==[HAC][OH-] AC-] (hydrolysis process) 3) Substituting [HAC]==H+][AC-] Ka into Kh==[HAC][OH-] AC-].

4)kh==[h+][ac-][oh-]/ka][ac-]kh==kw/ka

There is a simple way to judge whether it is easy to dissolve or not.

Generally, most of them are polar and intolerant.

Non-polar is not easily soluble.

Because water is a polar molecule.

The centers of positive and negative charges in the molecule do not coincide, from the perspective of the whole molecule, the distribution of the charges is uneven and asymmetrical, such a molecule is a polar molecule, a diatomic molecule bound by a polar bond must be a polar molecule, a polyatomic molecule bound by a polar bond, if the configuration of the molecule is asymmetrical, the molecule is a polar molecule.

There is a colloquial phrase (1) potassium, sodium, nitrate, ammonium dissolves water quickly.

2) Sulfuric acid only removes barium, lead and calcium.

3) Chlorination needs to remove mercurous and silver.

4) Carbon, silicon, and phosphosphine indentation.

Fourth, the first article must be satisfied. The first also includes soluble sulfides. All other sulfides are insoluble in water.

The above refers to salts.

Acids: Only silicic acid is insoluble in water.

Alkalis: Only potassium, sodium, barium, hydroxides are soluble in water. Ammonia itself is an aqueous solution.

Among oxides: potassium, sodium, barium, calcium oxides, sulfur trioxide and sulfur dioxide are not soluble in water, but react with water.

The active metal reacts with water and is not called soluble in water.

In addition to bromine, iodine and chlorine, non-metal monolithic can react with water, and it is difficult to react with water.

CuO+(dilute)H2SO=4CuSO4+H2ozN+(dilute)H2SO=ZnSO4+H2

zn+cuso4=znso4+cu

fe+cuso4=feso4+cu

At the end of the reaction, there was no change in the iron sheet, indicating that all the copper sulfate had been replaced by zinc into metallic copper, so the filter residue must contain copper.

First of all, if copper oxide and zinc powder are concentrated in sulfuric acid, copper oxide will form copper sulfate with sulfuric acid, and zinc powder will replace the copper element, and then the iron sheet is inserted without the elemental replacement, indicating that the copper has been filtered out and there is no copper in the solution.

Because Zn is more reactive than Cuo, Zn first reacts with H2SO4 to form ZnSO4 during the reaction

The excess of H2SO4 reacts with CuO to form CuSO4

If there is no change after the iron sheet is inserted, it means that the solution does not contain CuSO4, only ZnSO4, so the filter residue must contain CuO

Select BANitrogen 60 is a molecule composed of 60 nitrogen atoms, and nitrogen is a molecule composed of two atoms. The more familiar oxygen and ozone are also in this relationship.

The answer is A

Option b Nitrogen 60 is an isotope of nitrogen.

Does Nitrogen-60 refer to isotope or molecule?

Refers to isotopes: none of them are correct.

is the molecule: bNitrogen 60 is an elemental element of nitrogen.

It is an allotropic form with N2, which is a kind of elemental element of N. Just like O2 and O3, but the chemistry is not exactly the same (e.g. ozone is more oxidizing than O2).

b For example, C:C60, activated carbon, carbon black, graphite, and diamond are all elemental elements composed of C, and that's it.