High School Chemistry Compulsory 2 Prepreview, Senior 1 Chemistry Compulsory 2 Mid term

Comrade, are you the version of the people's religion or the version of the Soviet religion or the version of the Lujiao.

In the above decay equation, the mass of the decay product Ni is 60 and the nuclear charge Z is 26.

Because 0-1e loses a proton in a trouser, the number of nuclear charges is 27-1=26, and the number of quality and hunger does not change.

If you don't understand, you can ask.

This question is about the discharge sequence of ions during electrolysis in the dissolved limb solution, I don't know if you have talked about it.

Cation: Cu2+ >H+ >Al3+ > Mg2+ >Na+ >K+

Anions: I->Br->Cl->-OH->SO4 2- and NO3-etc>F-

1) When the electrolyte content decreases and the amount of water decreases during electrolysis, the electrolyte used is (NaCl) (CuSO4).

Partial ion discharge of electrolyte, H+ or OH- discharge of ionization of water.

2) When the quality of the electrolyte remains unchanged and the amount of water decreases, the electrolyte used is (H2SO4) (Na2SO4).

The ions of the electrolyte are not discharged, only the H+ and OH- discharges of water.

3) When the amount of electrolyte and water cracks changes during electrolysis, the electrolyte used is ( ).

This problem is repeated by Hewlett Packard Enterprise (1), if only the electrolyte is reduced, that is, HCl, CuCl2 --- only the ion discharge of the electrolyte.

1. If potassium permanganate is introduced, ethylene will be oxidized to carbon dioxide, which is an impurity in methane, and 2C and two chlorines cannot be added.

The 3D molecule without n in it is certainly not a polymer.

4b The same molecular formula is either the same substance or isomer. Look at the concept.

c must be structurally similar.

d There are counterexamples of naphthenic hydrocarbons + olefins, and between different hydrocarbons.

5C 6D7C hydrocarbons only contain C and H, the carbon content is the same, the hydrogen content is the same, the simplest formula is the same8CaCO3 + CO2 + H2O===Ca(HCO3)29D10(1) The relative density of air is 2, that is, 29*2(2) The volume ratio of carbon dioxide and water vapor is 1:1 (same temperature and pressure), CO2:H2O=1:

1, which is c:h:o=1:

2:3 A certain organic matter is completely burned, only carbon dioxide and water vapor are generated, and the quality of soda lime increases, and the difference is oxygen consumption.

3) The complete esterification of acetic acid indicates that it is alcohol.

That's all for the prompts, so let's do it yourself

1 If potassium permanganate is introduced, ethylene will be oxidized to carbon dioxide, which is an impurity in methane 2c3d

4BCs must be structurally similar.

When d is equal, it is an isomer.

5c 6d 7c8

CaCO3 + CO2 + H2O===Ca(HCO3)29D10 can't do it...

According to the hydrocarbon ratio.

(1) Select B A: There is carbon dioxide generation, and there are new impurities C: ethylene can also react with hydrogen.

D: Both react to form CO2 and H2O

2) Select C a: ethylene reacts with hydrogen.

b: Ethylene reacts with water.

d: Ethylene reacts with hydrogen bromide.

3) Choose the chemical formula of the first three to write n, and d can write the chemical formula, (4) should emphasize that the structure is similar to be correct, and b is correct.

5) Remove the chemical formula according to the chemical formula and then draw the structural formula and select A

6) Select B to see that the structure is similar.

7) choose C8) Na2CO3 + H2O + CO2 = 2NaHCO3 (9) choose D

10) Let the molar mass of CO2 be x, then the molar mass of H2O is x44x+18x= and the solution is x=3 5

mh= mc= so contains mo=

mol c:h：o=3：6：1

The ratio to air is 2 (1) 29 + 29 = 58

2)c3h6o

3) Since esterification can occur, H is added to the saturated state around C for H-C-C-C=O.

The first question a is because methane and ethylene are both gases, ethylene and potassium permanganate react to produce carbon dioxide gas, (potassium permanganate is a strong oxidant) carbon dioxide gas is mixed in methane and has impurities.

2C 3D Question 4 A is wrong B is right Isomerism refers to the phenomenon that the molecular formula is the same but the structural formula is not the same due to the difference in the order of atomic bonding and bonding mode within the molecule of organic compounds. b has been highlighted for different substances. The premise of the homologues is that they are structurally identical, have the same functional groups, and then there are several differences in CH2

5c 6c 7c 9d

How can such a question be asked here? Little brother, I didn't say you, what do you mean by this? Even if you know, you can't say anything more!

b remembers the first one, the small college entrance examination is over%.

An atom with an outermost electron count of 2 times the number of secondary outer shell electrons is: Carbon is an atom with 3 times the number of secondary outer electrons is: oxygen.

The atom with 4 times the number of electrons in the secondary outer shell is: Neon.

An atom with an equal number of electrons in the outer shell is an atom with a total number of electrons in hydrogen, beryllium, and aluminum in a short period that is twice the number of electrons in the outermost shell.

The number of electrons in the secondary outer shell is twice the number of electrons in the outermost shell: the sum of the number of electrons in the inner shell of lithium and silicon is twice the number of electrons in the outermost shell: lithium and phosphorus.

1：c（2-4）

2：o（2-6）

3：:ne（2-8）

4：h（1） be（2-2） al （2-8-3）5：be （2-2）

6: li (2-1) si(2-8-4)7:li (2-1) p (2-8-5) is pretty much these, I don't know if it will be less.

a。With the content as the weight, the weighted average of the mass is the relative atomic weight. 10*

Hello: The answer is slightly more than 20%, why?

10-5 b is x, 11-5b is 1-x

10x+11（1-x）=

x=, 10* at mass fraction. 8==

Solution: n2 + 3h2 = 2nh3

Start 2mol 3mol 0

Reaction x 3x 2x

Equilibration 2mol-x 3mol-3x 2x

According to the ratio of pressure = the ratio of the amount of matter:

2mol+3mol-(2mol-x +3mol-3x + 2x)]/2mol+3mol)*100%=20%

x = then the ratio of the amount of substances of the three gases in the mixture at equilibrium = (:(3mol-3*:2*:3:2

Conversion rate of nitrogen =

The molar mass of ammonia at equilibrium is constant, and the amount of ammonia at equilibrium is 17g mol = 2*

The mass of ammonia at equilibrium = 1mol*17g mol=17g, I hope mine can help you learn!

If you have questions, you can follow up.

mol/l n2+3h2=2nh3

Starting 4 6 0

Transfer x 3x 2x

Endpoint 4-x 6-3x 2x

It is known that the pressure is reduced by 20%, so the sum of the concentrations is reduced by 20% in the same volume, (10-2x) 10=, and the solution is x=1

So the ratio of the quantities of matter is 3:3:2. The nitrogen conversion rate is 25%, and the molar mass of ammonia is numerically equal to the relative molecular weight of 17.

Assuming that nitrogen and hydrogen react x,3x mol respectively,then ammonia is generated 2x mol,and only 2-x,3-3x,2x. are left after the reactionAccording to the pressure change 2-x+3-3x+2x=(2+3)*, x=so after equilibrium, ammonia has 1 mole, and the molar ratio of each substance is:; 1=3;3:

2.Nitrogen conversion rate thanks.