Xueba God-level system

I saw a question suddenly appeared on the interface of the computer, and it was the most difficult chemistry to understand.As a hero player of Hou Yi, he knows nothing about science questions, so how can he answer them?



However, although he did not listen carefully in class, he was reviewing very solidly after class.Just give it a try, if you get it right, you can attack the next tower.



I saw that the title is a compulsory one in chemistry, and there is a multiple-choice question about the amount of matter.



Let NA represent the value of Avogadro's constant.Which of the following statements is incorrect is ()



A. The number of oxygen atoms contained in the mixed gas of NO2 and CO2 with the total number of molecules being NA is 2NA



B. The number of carbon atoms contained in the mixed gas of 28g ethylene and butane (C4H8) is 2NA



C.常温常压下，92g的NO2和N2O4混合气体含有的原子数为6NA



D. Under normal temperature and pressure, 22.4L** fully reacts with a sufficient amount of magnesium powder, and the number of transferred electrons is 2NA



My god, after reading the title, Hou Yi was stunned.Now who can be blamed, who can only blame himself for not listening to the lectures well in the first place.



Although it looks like a headache, if you organize the ideas of the test centers involved in it clearly, no matter how difficult the question is, it will be easily solved.



The main examination is the calculation of Avogadro's constant, the amount of matter, the molar volume of gas, and the number of electron transfer in redox reactions, which Hou Yi still knows.

Remember m in a second.



He began to check one by one, even if he removed a wrong answer, it would be beneficial to his next answer.First look at option A, the amount of substance in the mixed gas of NO2 and CO2 whose molecular number is NA is 1mol, let NO2 be xmol, CO2 be ymol, then x+y=1mol, then the total amount of oxygen atoms is: 2x+2y =2mol, then the number of oxygen atoms is 2NA, correct; B. The simplest formulas of ethylene and cyclobutane are the same, both are CH2, therefore, the number of carbon atoms contained in the mixed gas of 28g ethylene and cyclobutane (C4H8) is 2NA, correct; C. NO2 and N2O4 have the same simplest formula, both are NO2, therefore, under normal temperature and pressure, the number of atoms contained in 92g of NO2 and N2O4 mixed gas is 6NA, correct; D. It should be under standard conditions, wrong .



Hou Yi saw the clue of this question, and calculated it in his brain as quickly as possible, and he directly clicked D to submit it.



During the system review, the countdown is 5 seconds.



With the end of time, congratulations, you answered correctly, just like this, the enemy has pushed down one of our towers.



It just so happened that Arthur, who was operated by Li Hu, had unknowingly come to a piece of grass behind Hou Yi.This is a typical Hou Yi shooting tower, Arthur is in the back.



Taking advantage of Hou Yi's excitement, Arthur suddenly jumped and hit him with all his attacking power.Don't look at the fact that Arthur has already sent out two heads, but his power sometimes cannot be underestimated.To deal with a hero like Hou Yi, you can only sneak attack, not hard.He is a shooter, and his attack range is very large, and he will not be able to get close to him for a while, so sneak attack is the kingly way.



Seeing that Arthur was fighting fiercely, the enemy's Dian Wei brought a group of men, two soldiers, and a gun cart to the grass where Arthur had been ambushed just now.