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sweet-ann [11.9K]
2 years ago
11

A covalent chemical bond is one in which _____. a covalent chemical bond is one in which _____. outer-shell electrons of two ato

ms are shared so as to satisfactorily fill their respective orbitals electrons are removed from one atom and transferred to another atom so that the two atoms become oppositely charged protons and neutrons are shared by two atoms so as to satisfy the requirements of both atoms electrons from the same atom, but opposite spins, are paired outer-shell electrons of one atom are transferred to fill the inner electron shell of another atom
Chemistry
2 answers:
alexgriva [62]2 years ago
7 0

A covalent chemical bond is one in which outer-shell electrons of two atoms are shared so as to satisfactorily fill their respective orbitals.

<h2>Further Explanation;</h2><h3>Chemical bond  </h3>

A bond is a type of force that is formed between atoms of different through the sharing or transfer of electrons.

<h3>Types of chemical bonds.</h3><h3>Covalent bond  </h3>
  • This is a type of bond that is formed between non-metal atoms. It is formed as a result of sharing electrons between non-metal atoms.
  • Outermost electrons are shared between the atoms involved in bonding so as each atom attains a stable configuration.
  • When atoms involved contribute an equal number of electrons to the bond formation, the type of bond is known as a covalent bond
  • A covalent bond may be a dative covalent bond when the shared electrons come from one atom.
<h3>Ionic bond  </h3>
  • This is a type of bond that occurs between metal ions and non-metal ions. Ionic bond occurs as a result of the transfer of electrons from one metal atom to another non-metal atom.
  • After the transfer of electrons, metal atom loses an electron to form a cation while the non-metal atom gains electrons to form an anion.
<h3>Polar covalent bonds </h3>
  • Polar covalent bonds involve uneven sharing of electrons between a non-metal atom and another non-metal atom.
  • Electrons spend more time around one of the atoms involved in bonding than the other atom.
  • The uneven distribution of electrons or differences in electronegativity between atoms bonded to each other is referred to as a polar bond.
  • Examples of polar covalent molecules, S-F, O-F, etc.
<h3>Non-polar covalent bonds </h3>
  • It is a type of covalent bodn in which two atoms share a pair of electrons equally with each other.
  • The electronegativity of the two atoms involved in non-polar covalent are equal.
  • Non-polar covalent bonds involves non-metal non-metal atoms.
  • Examples of non-polar covalent molecules includes; F-F, H-H, etc.

Keywords: Polar covalent, non-polar covalent, ionic bonds, covalent bonds.

<h3>Learn more about:</h3>
  • Chemical bonds: brainly.com/question/1462731
  • Ionic bonds: brainly.com/question/1462731
  • Covalent bonds: brainly.com/question/1462731
  • Polar covalent bonds: brainly.com/question/1462731
  • Non-polar covalent bond: brainly.com/question/1462731

Level: High school  

Subject: Chemistry  

Topic: structure and bonding  

Sub-topic: Covalent bond

PtichkaEL [24]2 years ago
5 0

Answer:

            A covalent chemical bond is one in which <u>outer-shell electrons of two atoms are shared so as to satisfactorily fill their respective orbitals</u>.

Explanation:

                   Covalent bonds are formed between two atoms having their electronegativity difference less than 1.7. In this type of bonding the valence electrons of one atoms forms molecular bond with the valence electrons of another atom. The electrons are mutually shared.

                   Covalent bond can be non-polar as for example formed between hydrogen and carbon atoms.

                   Also, covalent bond can be polar in nature as that formed between hydrogen and chlorine atoms because the chlorine atom is more electronegative and hence attracts the electrons more towards itself making density of electrons less on hydrogen atom.

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Answer:

1.342g of picolinic acid and 6.743mL of 1.0M NaOH diluting the mixture to 100.0mL

Explanation:

<em>The pKa of the picolinic acid is 5.4.</em>

Using Henderson-Hasselbalch formula for picolinic-picolinate buffer:

pH = pKa + log [Picolinate] / [Picolinic]

<em>Where [] could be taken as moles of each species</em>

<em />

5.61 = 5.4 + log [Picolinate] / [Picolinic]

0.21 = log [Picolinate] / [Picolinic]

1.62181 = [Picolinate] / [Picolinic] <em>(1)</em>

<em></em>

Now, both picolinate and picolinic acid will be:

0.100L * (0.109mol / L) =

0.0109 moles = [Picolinate] + [Picolinic] <em>(2)</em>

<em></em>

First, as we will start with picolinic acid, we need add:

0.0109 moles picolinic acid * (123.10g/mol) = 1.342g of picolinic acid

Now, replacing (2) in (1):

1.62181 = 0.0109 moles - [Picolinic] / [Picolinic]

1.62181 [Picolinic] = 0.0109 moles - [Picolinic]

2.62181 [Picolinic] = 0.0109 moles

[Picolinic] = 4.157x10⁻³ moles

And:

[Picolinate] = 0.0109 - 4.157x10⁻³ moles =

<h3>6.743x10⁻³ moles</h3><h3 />

To obtain these moles of picolinate ion we need to make the reaction of the picolinic acid with NaOH:

Picolinic acid + NaOH → Picolinate + Water

<em>That means to obtain 6.743x10⁻³ moles of picolinate ion we need to add 6.743x10⁻³ moles of NaOH</em>

<em />

6.743x10⁻³ moles of NaOH that is 1.0M are, in mL:

6.743x10⁻³ moles * (1L / 1mol) = 6.743x10⁻³L * 1000 =

<h3>6.743mL of the 1.0M NaOH must be added</h3><h3 />

Thus, we obtain the desire moles of picolinate and picolinic acid to obtain the buffer we want, the last step is:

<h3>Dilute the mixture to 100mL, the volume we need to prepare</h3>
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2 years ago
Like many other organic solvents we will use this semester, ethanol is flammable and caution needs to be exercised when heating
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Answer:

See explanation

Explanation:

A flammable solvent refers to a solvent that catches fire easily. The precautions to be taken when working with flammable solvents are;

1) heat the solvent at a low to medium hot plate setting.

2) if you need to boil the solvent, use a condenser rather than a flask or beaker without a cover.

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Find the age t of a sample, if the total mass of carbon in the sample is mc, the activity of the sample is a, the current ratio
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When exposed to very high temperatures, metals like iron can be turned into fluids that flow and can be poured into molds. What
oksano4ka [1.4K]

Answer: B) The energy of the solid increases, and the particles begin to slide past each other.

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The energy of the solid matter is required to be increased so that molecules of the solid matter get separated from each other and an transition from solid matter to liquid matter occurs. The liquid components of the matter will slide past each other as they have obtain energy for fluidity. The liquid iron can be molded into any shape and the energy decreases considerably.

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A sample contains 2.2 g of the radioisotope niobium-91 and 15.4 g of its daughter isotope, zirconium-91. how many half-lives hav
dybincka [34]

Answer: 3

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Equation for the reaction of decay of _{19}^{40}\textrm{K} radioisotope follows:

Moles of zirconium=\frac{\text{Given mass}}{\text{Molar mass}}=\frac{15.4}{91}=0.17moles  

Moles of niobium=\frac{\text{Given mass}}{\text{Molar mass}}=\frac{2.2}{91}=0.024moles  

_{41}^{91}\textrm{Nb}\rightarrow _{40}^{91}\textrm{Zr}+_{+1}^0e

By the stoichiometry of above reaction,

1 mole of _{40}^{91}\textrm{Zr} is produced by 1 mole _{41}^{91}\textrm{Nb}

So, 0.17 moles of _{40}^{91}\textrm{Zr} will be produced by = \frac{1}{1}\times 0.17=0.17\text{ moles of }_{40}^{91}\textrm{Nb}

Amount of _{82}^{212}\textrm{K}

decomposed will be = 0.17 moles

Initial amount of _{40}^{91}\textrm{Nb}  will be = Amount decomposed + Amount left = (0.17 + 0.024)moles =0.194 moles

a=\frac{a_o}{2^n}

where,

a = amount of reactant left after n-half lives = 0.024

a_o = Initial amount of the reactant = 0.194

n = number of half lives= ?

Putting values in above equation, we get:

0.024=\frac{0.194}{2^n}

n=3

Therefore, 3 half lives have passed.

3 0
2 years ago
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