All categories

3 years ago

Which type of model best represents simple molecules?

Chemistry

2 answers:

natka813 [3]3 years ago

6 0

Answer:

Lewis dot

Explanation:

It's a very simplified representation of the valence shell electrons in a molecule.

lesantik [10]3 years ago

3 0

The correct answer is Lewis dot.

A Lewis dot structure of a molecule is a structure in which the valence electrons of the molecule are represented using dots.

It is usual to seek a simple representation for simple molecules that explains in part, the properties of the molecule.

Such a representation must show the valence electrons in the molecule. A simple representation that can do this is the Lewis dot structure of molecules. The Lewis dot structure of NO2 molecule is shown in the image attached to this answer.

It was introduced by G.N Lewis and can be successfully used to represent many simple chemical molecules.

brainly.com/question/4144781

You might be interested in

How many electrons are in sodium-20?

Eva8 [605]

Answer:

Explanation:

According to the periodic table Sodium (Na) has 11 electrons.

5 0

4 years ago

Solid iron sulfide combines with aqueous hydrogen chloride to form hydrogen sulfide gas and aqueous iron chloride.

KIM [24]

Answer:

Fe2S3 + 6HCl → 3H2S + 2FeCl3 is a double-displacement reaction

Explanation:

Step 1: The balanced equation

Fe2S3 + 6HCl → 3H2S + 2FeCl3

Step 2:

Decomposition: This is a reaction in which a compound breaks down into two or more simpler substances. Most decomposition reactions require an input of energy in the form of heat, light, or electricity.

The general form of a decomposition reaction is: AB→A+B

In our case, this is not a decomposition reaction.

Synthesis: This is a type of chemical reaction in which two or more simple substances combine to form a more complex product. The reactants may be elements or compounds, while the product is always a compound.

The general form of a decomposition reaction is: A + B → AB

In our case, this is not a synthesis reaction.

Single-displacement reaction: This is a reaction in which one element replaces a similar element in a compound. The general form of a single-replacement (also called single-displacement) reaction is:

A+BC→AC+B

In our case, this is not a single-displacement reaction.

Double - displacement reaction: This is a reaction in which the positive and negative ions of two ionic compounds exchange places to form two new compounds. The general form of a double-replacement (also called double-displacement) reaction is:

AB+CD→AD+B

In this reaction, A and C are positively-charged cations, while B and D are negatively-charged anions. Double-replacement reactions generally occur between substances in aqueous solution. In order for a reaction to occur, one of the products is usually a solid precipitate, a gas, or a molecular compound such as water.

In our case: There occurs a duble replacement between Fe^3+ and S^2- with H+ and Cl-.

Fe2S3 + 6HCl → 3H2S + 2FeCl3 is a double-displacement reaction

8 0

3 years ago

Scientists digging in a cave found an unknown substance. The scientists

Vaselesa [24]

Answer:

By adding heat energy

It changed to gas

Explanation:

A substance whose molecules are moving around each other is a liquid. They are held in shape by very weak intermolecular forces.

For solids, there is no movement because the molecules are held up in a fixed lattice.

Gases molecules moves randomly and independently of one another.

When a liquid is heated and it gains heat energy, it changes phase.
A phase change to gas can be predicted.
This is because there is an increase in the speed of the substances.

6 0

3 years ago

A reaction product mixture containing hydrocarbons in diethyl ether is washed with saturated aqueous sodium chloride (brine) sol

Natalija [7]

Answer:

Option A. This step is to remove water from the ether layer.

Explanation:

When the goal of an experiment is to conduct a reaction and isolate the product, it is referred to as work-up. The work-up refers to method aimed at purifying the material and most commonly occur in a separatory funnel. Solutions are added to the funnel to either extract or wash the mixture with the goal of isolating the product from excess reagents, catalysts, solvent, side product that may arise from side reactions.

Common washes include: Water, Sodium Bicarbonate, Sodium Carbonate, saturated sodium chloride (brine).

When an organic layer ( e.g. diethyl ether, ethyl acetate) is washed with brine, the purpose of the wash is to REMOVE LARGE AMOUNT OF WATER that may be dissolved in the organic layer.

Brine works to remove water from an organic layer because it is highly concentrated (since Sodium Chloride is highly water soluble. Therefore, the most likely reason for washing a reaction product mixture containing hydrocarbons in diethyl ether with with brine solution in a separatory funnel is to remove the water from the ether layer.

8 0

3 years ago

The definition of chemical symbol

frozen [14]

an abbreviation or short representation of a chemical element; thesymbols in the periodic table

6 0

3 years ago

Read 2 more answers