A chemistry problem, learned the molar mass

That is, 22 44 = mol, CO2 contains 22 electrons, so it is 11 mol electrons.

That is, 8 2 = 4 mol, and H2 contains 2 electrons, so it is 8 mol electrons.

N2 to the power of 24 --- i.e. mol, N2 contains 14 electrons, so it is 28 mol electrons.

, i.e., 18 g, i.e., 18 18 = 1 mol, H2O contains 10 electrons, so 10 mol electrons.

So the one with the most electrons is 3

22gCO2 i.e., 8G2 is 4molH2, N2 is 2molN2, 4 when the water expands greatly, but the density change is not greater than, so 18mlH2O is about 1mol (in fact, it is not, but it can be approximated).

So. The highest number of molecules contained is 8gh2; The highest number of atoms contained is 8gh2; The largest mass is n2; The one with the highest number of electrons is n2.

1, n = 22 44 = , number of electrons =

2, n = 8 2 = 4 mol, electron number = 4 2 = 8mol3, n = 24 to the 24 power of the 23rd power = 2mol, electron number = 2 14 = 28mol

4, n = 18 18 = 1mol, number of electrons = 1 10 = 10mol

The number of electrons is the same as the amount of matter that compares electrons, so let's compare the amount of matter with electrons:

1. 1mol carbon dioxide contains 22mol of electrons, 22g of carbon dioxide is, 22*mol hydrogen contains 2mol of electrons, 8g of hydrogen contains 4mol, 2*4=8molmol nitrogen contains 14mol of electrons, 2mol of nitrogen contains electrons 2*14=28molmol of water contains 10mol, 18ml of water contains 1mol, 10*1=10mol

g CO2 is, 1molCO2 contains the number of electrons is 6+8*2=22, and the total number of electrons is = 11 mol

G H2 is 4 mol, 1 mol H2 contains 2 mol of electrons, and the total number of electrons is 2*4 = 8 mol

3. Three contains 2molN2, 1mol N2 contains 14mol electrons, and the total number of electrons is 14*2 = 28mol

The ml of water weighs 18 g, i.e. 1 molH2O, and the total number of electrons is 10 mol

Let the amounts of carbon dioxide and carbon monoxide substances be respectively.

There are x+y=44x+28y=15

The solution gives x = y = x y = 1 2

The relative molecular mass of 1mol neon is the relative atomic mass of neon, so, the mass is.

The formula is. 1mol=pcs.

Because in general chemistry, a unit is not written as a unit, so it is regarded as a constant, that is, mol is actually a unit of quantity expression, and I don't understand it.

n=n na= 22 times 23 times = Did you enter your number wrong, not divisible m=

1mol neon has an atom! So divide by to get! And because the relative atomic mass is 20, the mass is 20*!

In a dilute sulfuric acid solution with a mass fraction of 1 liter, the mass of the solution = 1 * 1060 = 1060 grams, the mass containing sulfuric acid = 1060 * grams, and the amount of H2SO4 = ; The mass containing water = g = kilogram, the amount of its substance =

The molar concentration of sulfuric acid trembled = large eggplant.

The amount of concentration of the substance =

Mole fraction =

1,a has the same volume, the same amount of matter, the same number of molecules, and each molecule is 2 atoms. So, the number of atoms is the same.

2, Na2SO4 solution A Na2SO4 in a SO4 2-, SO4 concentration is, mol l MGSO4 solution A SO4 in a MgSO4 2- , SO4 2- concentration is, Al2(SO4)3 solution A AL2(SO4)3 solution in 3 SO4 2- , SO4 2- concentration is.

3, c na2o --2naoh

So, Na2O produces more NaOH.

4, Set the mass m

m/16 : m/2 =8:1

5, n(cl-)=n/na= n（mcl2）=

m=m/n=95 g/mol

The relative molecular mass is 95

m relative molecular weight = 95-71 = 24

6,n(hcl)=a/

The amount concentration of the substance of the resulting hydrochloric acid is = (a * 1000 = 1000a mol l