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3 years ago

How can bonding determine the properties of a substance?

Chemistry

1 answer:

miskamm [114]3 years ago

4 0

Answer:

Explanation:

Chemical bonds are the forces that held the atoms in a molecules together. The strength of the bonds determine the some physical properties of material for example their hardness, solubility, boiling point, melting point etc. The stronger the bond , stronger will be the forces between them and it make difficult to separate the atoms.

There are three common type of bonding between atoms.

Ionic bonding

Covalent bonding

Metallic bonding

Ionic bonds are formed by complete transfer of electronic from one to another atoms. The compound having ionic bonds generally have moderate to high boiling points and melting point because of greater electrostatic interaction. Their electrical conductivity are high and these minerals tend to dissolve in water.

Covalent bonds are formed as a result of sharing of electrons between atoms. These compounds are insoluble , hard, having low melting and boiling points and have low conductivity.

The metallic bond is formed when metals are present. Due to loosely bound electrons of metals, electrons are shared with the other atoms. This is a type of covalent bond but it is not a true covalent bond. Th mobile electrons import great electrical conductivity in material. As this is a weak bond so these materials have low melting and boiling points.

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Select all of the chirality centers in the structure. a selected atom will turn green.

scZoUnD [109]

Answer:

The answer is C is attached to four unique gatherings A, B C and D, Thus it frame two optical isomers as the perfect representations of one another.

Explanation:

A critical class of isomers in which mixes have the equivalent sub-atomic recipe and structure, yet the distinction emerges from the introduction of the gatherings in the 3D space. Optical isomers are called as enantiomers. Enantiomers are optical isomers whose identical representations are non-superimpose. They turn the plane enraptured light inverse way. Optical action is characterized as the capacity of a choral atom to pivot the plane energized light. The enantiomers that pivots the plane energized light a clockwise way is called extraordinary, while the one that turns the plane spellbound light an anticlockwise way is called rotatory. Basics , Centrality is the major behind the optical movement of a natural atom. Choral focus: A'C' particle in a particle turns into a choral focus when all the four valences of that molecule are fulfilled by synthetically unique gatherings.

4 0

3 years ago

A block of aluminum occupies a volume of 15ml and weighs 40.5 g, what it its density?

san4es73 [151]

<h2>Answer:3 $gmL^{-1}$ </h2>

Explanation:

Let $v$ be the volume of the given material.

Let $m$ be the mass of the material.

Let $d$ be the density of the material.

Density of a material is defined as the ratio of its mass to its volume.

$d=\frac{m}{v}$

Given,

$m=45g\\v=15ml$

So, $d=\frac{45}{15}=3gmL^{-1}$

5 0

3 years ago

The molecular weight of H2SO4 is: 49.078 g/mole 98.086 g/mole 194 296 armoe

a_sh-v [17]

Answer:

The answer to your question is: 98 gr / mole

Explanation:

Molecular weight and molecular mass are synonyms and they referred to sum of the the molecular masses of the elements that form part of a compound. Their units are grams/ mole

In your example we need to sum the molecular mass of the components of sulphuric acid.

Like this:

Hydrogen(H) = 1.008 x 2

Sulphur (S) = 32 x 1 = 32

Oxygen = 16 x 4 = 64

Total = 98 gr / mole

3 0

3 years ago

Ellie started her reaction between the KMnO4 and malonic acid by first heating the two solutions in the hot water bath. She then

sergij07 [2.7K]

Answer:

The time recorded in the lab notebook is shorter than the true reaction time because the reaction starts the moment the two solutions were mixed

Explanation:

A chemical reaction is "a process that involves rearrangement of the molecular or ionic structure of a substance, as distinct from a change in physical form or a nuclear reaction" (Oxford dictionary).

A chemical reaction begins immediately the reactants are mixed together in a reaction vessel because the particles of the reactants immediately begin to collide with each other. There is no lost time before reactions begins!

This implies that, the time recorded in the lab notebook is shorter than the true reaction time because the reaction starts the moment the two solutions were mixed.

5 0

3 years ago

Classify each substance as a pure substance or a mixture.

Arisa [49]

Answer:

1) Copper is a pure substance

2) A solution of sugar dissolved in water is a mixture

3) Carbon dioxide is a pure substance.

4) Seawater is a mixture

5) Table salt is a pure substance.

Explanation:

1) Copper, which consists of only one kind of atom

There are two kind of pure substances: elements and compounds.

Substances made up of one kind of atom, like copper, are elements.

There are 118 known elements, and you can find them in any periodic table.

Copper is the element with atomic number 29.

Thus, copper is a pure substance, because it is consituted by one kind of atoms.

2) A solution of sugar dissolved in water

A solution consists of solute and solvent, which can be in any proportion. The solutions of sugar and water may be 1%, 2%, 15%, 98%, or any percent. Thus, a solution does not have a fixed composition and is not a pure substance. Pure substances have definite compositions.

It is a mixture of sugar (solute) and water (solvent) which constitutes a solution.

A mixture is the physical combination of two or more substances which can be in any proportion.

Therefore, a solution of sugar and water is a mixture.

3) Carbon dioxide, which has two atoms of oxygen for each atom of carbon

Carbon dioxide has a definite composition of two atoms of oxygen for each atom of carbon. Every molecule of carbon dioxide has the same composition.

The atoms of carbon and oxygen are chemically bonded. They cannot be separated by any physical media.

Two or more atoms chemically bonded constitute a compound, which will have a definite composition and is a pure substance.

Thus, this is a pure substance.

4) Seawater, which can be purified by filtering it.

Mixtures can be purified by physical media, such as filtering (among many others like evaporation or uisng magnets, if one of the substaces has magnetic properties).

Pure substaces, elements or compounds, cannot be separated by physical media.

Seawater can be purified, i.e. separated from sand grains and algae residue, for instance, by fitering because seawater is a mixture.

Yet, the "pure" seawater, i.e. the liquid that remains after filtering, will be a mixture, because it is a solution of several salts (including sodium chloride, among others) and water.

You cannot separate the pure substances from seawater by filtering. That would require a chemical process.

Therefore, seawater is a mixture.

5) Table salt, which can be separated into sodium and chlorine only by chemical processes

The fact that the table salt can be separated into sodium and chlorine only by chemical processes indicates that it is a pure substance.

Table salt is the ionic compound NaCl

NaCl has a definite composition: every crystal of salt will have many NaCl units. Every NaCl unit is equal to any other NaCl unit: one atom of Na is chemically bonded to one atom of Cl.

The chemical bonds cannot be broken by physical media; a chemical process is required, and the formed substances will have completely different properties than the original compound.

Hence, table salt is a pure substance (a compound).

3 0

3 years ago