CHEMISTRY HIGH SCHOOL

What does the molecular formula of a compound describe?

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Answer 1
Answer:

Answer: Molecular Formulas. Molecular formulas are a compact chemical notation that describe the type and number of atoms in a single molecule of a compound. Identify the molecular formula of a compound given either its name or structural formula.

Explanation:

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Which compound is soluble in water?(1) PbS (3) Na2S(2) BaS (4) Fe2S3

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The compound Na2S or Sodium sulfide is soluble inwater. This compound is a water-soluble salt that give strong alkalinesolutions. When exposed to air or humidity this compound gives-off hydrogen sulfidethat smells almost the same as rotten eggs.

This chemical is commonly used in the pulp andpaper industry. Sodium sulfide compounds are usually used in chemicalphotography, textile bleaching, making dyes, and even detergents.

The other 3 compounds are non-soluble in water. Theircompositions are mostly metal in nature and require other process to transformthem into different compound forms. 

Answer;

(3) Na2S

Explanation;

  • All sodium salts are soluble in water. Therefore, sodium sulfide will be soluble in water.  
  • All sodium, potassium, and ammonium salts are soluble in water. The chlorides, bromides, and iodides of all metals except lead, silver, and mercury are also soluble in water.
  • The sulfides of all metals except barium, calcium, magnesium, sodium, potassium, and ammonium are insoluble in water.

In a nuclear power plant control rods are used to

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Control rods are used in nuclear reactors to control the fission rate of uranium and plutonium. They are composed of chemical elements such as boron, silver, indium and cadmium that are capable of absorbing many neutrons without themselves fissioning.

Regarding water's ability to move up a glass tube, which of the following is true?

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This ability of water is called a capillary action. This ability is exhibited by liquids where they flow in tubes without any assistance. This happens due to adhesion, cohesion and surface tension.

1. Science is different than many other ways of thinking because it is based on-opinions
-facts
-personal viewpoints
-none of the above

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Answer:

Facts

Explanation:

You can literally read the lesson it tells you science is

all about facts

What product(s) form in the following neutralization reaction? H2SO4 (aq) + Ba(OH)2 (aq) → A) 2H_20 (1) +BaSO_]4 (aq) B) 2H20 (1) +BaSO_4(s) C) 2H20 (1) D) BaSO4

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