Chemical equations expressed by symbols In general, the chemical equation is mercury + oxygen → (heating; written on the arrow) mercury oxide, read as mercury and oxygen generate mercury oxide under the condition of heating What is the equation of symbolic expression What does reading do?

2Hg+O2=2HgO

When to use "=", when to use "→" and the judgment characteristics of reversible reaction
Thank you

The left and right sides of the equation are balanced with "=", but not balanced with "→"
However, organic reactions are not strict with this requirement
Reversible reaction Generally speaking, both reactants and products are gases, which may be reversible reactions, such as synthetic ammonia and water gas. In solution, the ionization and hydrolysis of weak acid, weak base, strong acid and weak base salts, strong base and weak acid and weak base salts are reversible reactions

Morse code several numbers represent a Chinese character

Some need only two letters to spell a Chinese character, while others need five. If you use the Morse code to encrypt, it is also common for ten groups of passwords to form a Chinese character. For example: AI (layer 1) keyboard encryption: 21,43 (look at the mobile phone keyboard

How to add operation symbol and bracket in the middle of 5 2 to equal 5

2+2+2-2/2=5

What operation symbols are written between 10 and 1 and 4 and 1 and 1 and 2? How can we get 42?

10×1×4 / 1 / 1+2 =42
10×1×4×1×1+2 =42
(10+1)×4 +1 - 1 - 2 =42
(10+1)×4 ×1 ×1 - 2 =42
(10+1)×4 /1 / 1 - 2 =42

How to do four plus operation symbols or brackets

4*4+4+4
=16+4+4
=20+4
=24

4 = 5 fill in various operation symbols and brackets

（4×4+4）÷4=5

What operation symbol is added between 123456 equal to 5
Only add and subtract, not multiply and divide

1+2-3+4-5+6=5

123456. What kind of symbol can be used to equal 75?

This simple 1 + 2 + (3 + 4 + 5) * 6 = 75 is my first one

The following statement is correct: A: 0 has no opposite number; B positive and negative numbers are opposite to each other; C: - A's opposite number is a; D: the opposite number is its own number, with 0 and positive

Chemical equations expressed by symbols In general, the chemical equation is mercury + oxygen → (heating; written on the arrow) mercury oxide, read as mercury and oxygen generate mercury oxide under the condition of heating What is the equation of symbolic expression What does reading do?