A chemistry problem that exploded my brain

It's easy

From (1), we can get x>w, no problem, x has more o atoms than w, and the valency of o is -2;

From (2) w is obtained between z and y, and the high and low chemical states react to obtain the intermediate chemical state;

From (3) y>z, y has more o atoms than z, and with (1), then y>w>z;

From (4) z is between q and y, then y>z>q ;

If the cu valence is increased and the S valence remains unchanged, and there must be a price reduction, then x>y;

To sum up, the result is x>y>w>z>q

The answer is! ~

We do not know their chemical formulas, but we do know that they have the following conversion relationship (untrimmed) under certain conditions

1） x→w+o2

2） z+y+naoh→h2o+w

3） y+so2→z+so3

4） q+y→z+h2o

5) The order of the valency of nitrogen in these five compounds is ( ) a) xyzwq (b) xzyqw (c) xywzq (d) wxzqy y

This is a question in the Shanghai High School Examination.

Not necessarily. This can be a physical or chemical change. **It is an extremely rapid physical or chemical energy release process.

In this process, the matter in the void trembling room releases the energy contained in it at an extremely fast speed, transforming it into energy forms such as mechanical work, light, and heat.

Ratting grinding is not necessarily a chemical change. ** When a material system undergoes rapid physical changes or chemical reactions, the energy of the system itself is converted into mechanical work on the surrounding medium with the help of the rapid expansion of gases, usually accompanied by strong exothermic, luminous and acoustic effects.

Physical properties are caused by physical changes (factors such as temperature, volume, and pressure), and the properties and chemical composition of substances do not change before and after. For example, the ** of the boiler is a typical physical **, the reason for which is that the superheated water quickly evaporates a large amount of steam, so that the steam pressure continues to increase, and when the pressure exceeds the ultimate strength of the boiler, it will occur.

Chemistry is caused by chemical changes. Whether it is a mixture of combustible substances and air, or a high-quality substance (such as explosives), it is a relatively unstable system, which can produce a violent exothermic reaction under the action of a certain degree of energy in the outside world, producing high temperature, high pressure and shock waves, thus causing a strong destructive effect. For example:

Gas and dust**.