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Anonymous users2024-02-11Dude, we're the same. People have to bow their heads under the eaves. Carry it.
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Anonymous users2024-02-1028L gas under standard conditions.
Let the amount of H2 substance be Xmol, then O2 is (
2x+32（
X=1Z, the amount of H2 substance is 1 mol, the mass of O2 is 8 g, and the average relative molecular weight of the mixed gas is 8 g mol
It is a multiple of the oxygen density under the same conditions.
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Anonymous users2024-02-09In a, you need to see if there are atoms in the water molecule, and it should be said that there are no atoms in the molecules except for noble gases.
b I can't blame you for this, I didn't learn the ionization of water in my freshman year, and the water itself can ionize hydrogen ions and hydroxide ions, and hydrogen ions mainly exist in the form of hydronium ions, to be precise, there is no 1na
c does not specify whose amount of substance, generally speaking, chlorine atoms cannot exist alone, generally in the form of chlorine gas or chloride ions.
To clarify, if there are atoms in the molecule, then the error of a can also be understood as the presence of ions in water, and ions are not called atoms. Also, I don't know very well whether chlorine in organic matter exists in the form of atoms, you can ask someone else.
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Anonymous users2024-02-08The amount of chlorine atom of the substance is.
Can't say that.
H2O is 3 atoms, and water is the atom.
The water molecule contained in 1mol of water is the water molecule of 1Na.
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Anonymous users2024-02-07The atom exists in the molecular form of Cl2.
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Anonymous users2024-02-06C is wrong.
Notice that he's talking about chlorine atoms, and every two chlorine atoms make up a chlorine molecule, and the answer is obvious.
**If you don't understand, just ask me.
As for the first person's answer, I can tell you that the weak ionization of water is not required in the textbook, and when you learn about the ionization part, this knowledge point is still relatively important, and the problem of weak ionization of water should be considered in many topics.
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Anonymous users2024-02-054 A should be two NAs
b 14ana
The ratio of cd to 5, the amount of matter = 5:4
The ratio of the number of oxygen-containing atoms is = (5*2):(4*3)=5:6, and the mass ratio of sulfur-containing elements is 5:4
The mass ratio of oxygenated elements is = 5:6
The ratio of the number of sulfur-containing atoms is 5:4
6. The number na= is the amount of matter x.
m=8g n= n=m/n=32g/mol
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