Question

S-ZnS-H2S-SO2-Na2SO3

Answer 1

$1) \: Zn + S = ZnS$

$2) \: ZnS + 2HCl = H_{2}S + ZnCl_{2}$

$3) \: 2H_{2}S + 3O_{2} = 2H_{2}O + 2SO_{2}$

$4) \: 2NaOH + SO_{2} = Na_{2}SO_{3} + H_{2}O$

Answer 2

The sequence you provided appears to be a list of chemical compounds. Let's break it down:

1. S: This refers to sulfur, which is a chemical element with the symbol "S" and atomic number 16.

2. ZnS: This represents zinc sulfide, which is a compound made up of zinc (Zn) and sulfur (S). It is commonly found as a mineral called sphalerite and is used in various applications, including as a semiconductor material and in luminescent pigments.

3. H2S: This stands for hydrogen sulfide, which is a colorless, toxic gas with the chemical formula H2S. It has a characteristic rotten egg odor and is often encountered in natural gas deposits and volcanic gases.

4. SO2: This refers to sulfur dioxide, which is a colorless gas with a pungent odor. It is produced by burning fossil fuels containing sulfur, and it is a major component of air pollution. Sulfur dioxide can also be used as a preservative in the food industry.

5. Na2SO3: This represents sodium sulfite, which is a white crystalline powder used as a reducing agent and preservative in various industries, such as food and photography. It is the sodium salt of sulfurous acid (H2SO3).

Each of these compounds has its own unique properties and applications in chemistry and various industries. If you have any specific questions about any of these compounds or their uses, feel free to ask!