Simple Chemistry Problems Urgently, Hurry up and help 1

Able to conduct electricity - 2

Strong electrolyte The first ion equation is right.

The sulfuric acid in the second ionic equation cannot react with silver.

Unless it is concentrated sulfuric acid, but if it is concentrated sulfuric acid, it does not produce hydrogen, but produces substances such as water and sulfur dioxide, and the reaction is very complicated. So the second one is not right, there is no such reaction.

In addition, the microlyses must be written out in the product, and the arrow should be pointed downward.

None of them can conduct electricity.

NaCl crystals are strong electrolytes.

Both ionic equations are wrong (1; ba(oh)2 should be written as ba2++2oh-) (the second trim is incorrect).

Spawns must be written out, with a down arrow.

Conductive: 2 strong electrolytes: 1,3

The first pair. The second one is not right.

Silver cannot react with sulfuric acid except in concentrated sulfuric acid.

If it is slightly soluble, be sure to hit the downward arrow.

None of them can conduct electricity because it is liquid acetic acid and not a solution of acetic acid, which can only conduct electricity in solution.

If it is similar to Caoh2 in clarified lime water, do not write, that is, write if it generates turbidity, otherwise it will not be written.

The information comes from WWH, the third prize winner of the National Chemistry Competition, who is currently studying at Shanghai Jiao Tong University.

LZ probably didn't see the question clearly, and asked about dichlorogenates.

Analysis: In fact, there is only one methylene group (-CH2-) on adamantane,1If two chlorine atoms replace one methylene hydrogen atom, it is one;

2.If they represent different methylene hydrogen atoms on the same ring, they are another kind;

3.If the hydrogen atoms are not on the same ring, they are another kind.

So there are three in total.

I don't know if I've made it clear, but if you don't understand, welcome to ask.

1.The chemical formula of the oxide with proton number Z=A-N, R3+ is R2O3, the relative molecular mass is X=2A+48, the molar mass is (2A+48)G mol, and the amount of Ngr2O3 is N(2A+48)And because the number of protons contained in 1molR2O3 is 2Z+24=2A-2N+24, the number of protons contained in Ngr2O3 is N(2A-2N+24) (2A+48)=

a-n+12

na+242.The electron shell structure of the four ions is the same, and it can be obtained: a-m=b-n=c+n=d+m

So choose the number of electrons of the M2O3 molecule = its number of protons, so the number of protons of M is (50-3*8) 2 = is Al

The relative molecular mass of M2O3 = 2*(13+x)+(8+8)*3=102

The number of neutrons in the nucleus of m is solved x = 14

4.From xh3, it can be judged that x is of the va group. Therefore, the most ** oxide is X2O5, which is composed of the mass fraction of oxygen element = 16*5 (2X+16*5)=

The mass of x is obtained x = 14 = a + n, and since a = n (the number of protons is equal to the number of neutrons), a = 7, so x is the nitrogen element.

5.Similar to question 2: a-2=b-1=c+3=d+1

Ionic radius: C3->D->B+>A2+ (when the ionic electron shell structure is the same, the larger the number of nuclear charges, the smaller the ionic radius).

The number of protons z=a-2The mass a=z+b=a+b-2, therefore.

The symbol for the r atom is.

a+b-2a-2

rA+B-2 on the top left and A-2 on the bottom left

7.Number of protons a=m-n=number of electrons. The number of electrons of x+ is m-n-1Again: The amount of a substance of wgx+ is w m, so the amount of a substance containing electrons of wgx+ is.

w(m-n-1)/mmol

1.How many mols does kclo3 need to generate 16go2?

2kclo3 = mno2 heating = 2kcl + 3o22mol 96g

x 16g2mol x=96g Changqi 16gx=1 3 mol

2.Electrolysis 9 grams of water is resistant to chaos, if you can get how many grams of oxygen to accompany the spirit?

2H2O = Electrolysis = 2H2 + O2

9g y36/9g=32/y

y=8g