I saw that a question suddenly appeared on the interface of the computer, and it was still the most difficult chemistry to understand thoroughly. As a hero player of Hou Yi, he doesn't know anything about science questions, so how can he solve them.

However, although he didn't listen carefully in class, he was reviewing very solidly after class. Let's give it a try, and if you get it right, you can attack the next tower.

I saw that the topic was chemistry in the first compulsory course, and there was a multiple-choice question about the quantity of matter.

The value of Avogadro's constant is denoted by NA. Which of the following statements is incorrect ()

A. A mixture of NO2 and CO2 with a total number of molecules NA contains oxygen atoms of 2NA

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

C. At room temperature and pressure, the number of atoms contained in the NO2 and N2O4 mixture of 92g is 6NA

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

Oh my God, after Hou Yi finished reading the question, he was confused. Who can be blamed now, and if you want to blame, you can only blame yourself for not listening well in the first place.

Although it seems like a headache, if you organize the idea of the test points involved in it, even the most difficult questions will be solved.

The main examination is the calculation of Avogadro's constant, the amount of matter, the molar volume of gases, and the number of electron transfers in redox reactions.

He began to check one by one, and even if he removed one wrong answer, it would be beneficial for his next answer. First of all, look at option A, the amount of the substance of NO2 and CO2 mixed gas with the molecular number of 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 formula of ethylene and cyclobutane is the same, both are CH2, therefore, the number of carbon atoms contained in the mixture of 28g of ethylene and cyclobutane (C4H8) is 2NA, which is correct; C. NO2 and N2O4 have the same minimum formula, both are NO2, therefore, at room temperature and pressure, the number of atoms contained in the NO2 and N2O4 mixed gas of 92g is 6NA, which is correct; D. It should be a standard condition, wrong.

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

The system is under review, and the countdown is 5 seconds.

As the time ends, congratulations, the answer is correct, and just like that, the enemy has knocked out one of our towers.

It just so happened that Arthur, who was operated by Li Hu, had unknowingly come to a bush behind Hou Yi. This is a typical Houyi shooting tower, Arthur is behind.

Taking advantage of Hou Yi's excitement, Arthur suddenly jumped and hit him with all his attack power. Don't look at Arthur has already given away two heads, but his power sometimes should not 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 can't get close to him for a while, so sneak attack is the king.

Seeing that Arthur was fighting fiercely, the enemy's Dian Wei came to the grass where Arthur was ambushed just now with a group of men, two small soldiers, and a gun carriage.