Xueba God-level system

The quiet air was filled with the smell of blood.Within half an hour after Mr. Wu fell from the building, a hazy drizzle began to fall from the sky.

The evening self-study of class nine is also going on as scheduled.

In the geography class in the afternoon, they didn't wait until the head teacher came, and they won't in the future.

This campus will not fall into a stalemate due to the departure of someone, because there are many people who want to take your place.

Not only Wu Wenbin died, but also the magic star general Cheng Yaotie.

It seems that the sky is the greatest, as if everything is arranged in advance, what to do when, what kind of people to meet in where, there are all predestined.

Niu Zihao and Wang Xiang put Cheng Yaotie in the chemistry lab before the morning self-study. As expected, a teacher wanted to use this lab in the last class in the morning.The result is of course predictable, and for Cheng Yaotie, it can only be described as a miserable world.

After the third class, the students of Class [-], the first level, walked quickly to the laboratory.Before the class bell rang, the classroom was already full of students.It was crowded and lively.

I have to say that the students are still very enthusiastic about doing chemical experiments, which can be seen from their performance.

Not long after, the chemistry teacher also made his debut with a cup of Longjing tea.Unlike usual, the leather shoes on his feet were replaced by rare sneakers.Not for anything else, but because I was afraid of being splashed with the chemical test solution.

Concentrated sulfuric acid solution is enough to turn leather shoes into slippers in seconds, without any technical content.

The content of today's class is the reaction between metal sodium and water. It was because of this experiment that Cheng Yaotie died and went to the Western Paradise.

It's a pity that he will never have the chance to take the college entrance examination three years later. If he had, he would never forget this experiment.

Only by experiencing it yourself can you understand it more thoroughly.As the saying goes, go down the river to know the depth, and taste the pears to know the sweetness and sourness.

The teacher carefully explained the operation process of this experiment and what should be paid attention to.

No matter how much you teach, it is not as solid as the students' hands-on practice.

During this reaction process, a large amount of hydrogen (H2) will be generated, and it is this air substance that led to Cheng Yaotie's final demise.

我们不妨来看一下，金属钠与水所发生反应的化学式，2Na+2H2O=2NaOH+H2↑。

Among them, when the volume concentration of hydrogen in the air is between 4.1%≈74.2%, it will explode when encountering a fire source.

Hydrogen was present, but the ignition source was added later.

After the class ended, there were two boys who were responsible for cleaning the classroom. Not only were they lazy, they even smoked blatantly.

My good boy, I don’t know if I don’t smoke, I’m startled when I smoke.

The moment the lighter is turned on, a flame comes into contact with the hydrogen in the air.The windows in the laboratory are all tightly closed, which can be called the best storage room for hydrogen.

The consequences were disastrous, and the entire classroom was in a sea of ​​flames.

If those two students hadn't been quick and agile, and finally escaped, they probably would have become Cheng Yaotie's funeral.

Brother Tie is also unlucky, just like a mud bodhisattva crossing a river, he can't protect himself.

But he could only watch the sea of ​​flames around him, devouring all the dreams of the future.He also couldn't move, and he still hasn't healed from the wound he received from the magic star curse witch.