Chemistry, 01.09.2019 00:50 pramirez6994

Which formula represents a polar molecule?
(1) br2 (3) ch4
(2) co2 (4) nh3

Answers: 2

Show answers

Answers

Answer from: melissaschnelting

$\boxed{\left( 4 \right){\text{ N}}{{\text{H}}_{\text{3}}}}$ represents a polar molecule.

Further Explanation:

The attraction between atoms, molecules or ions responsible for the formation of chemical compounds is a chemical bond. It is formed either due to electrostatic forces or by the sharing of electrons.

The bond that results from the complete transference of electrons between metals and non-metals is an ionic bond. Metals, being electropositive in nature, have the tendency to lose electrons whereas non-metals tend to gain electrons due to their high electronegativity. Cations are formed by metal atoms while non-metals form anions with the gain of electrons.

The bond formed by mutual sharing of electrons between bonded atoms is a covalent bond. Such bonds usually exist between two or more non-metals.

The polarity of a bond depends on the electronegativity difference between the bonded atoms. The more electronegative atom will attract electrons more towards itself, thereby developing negative charge on itself and leaving the less electronegative atom with positive charge. Symmetry also plays an important role to determine whether a molecule will be polar or not. If symmetry is present in a molecule it will be non-polar, even there is an electronegativity difference between the bonded atoms.

(1) ${\text{B}}{{\text{r}}_{\text{2}}}$

This is formed by the combination of two Br atoms so there is no electronegativity difference between the bonded atoms and therefore this molecule is non-polar in nature (For structure, refer to the attached image).

(2) ${\text{C}}{{\text{O}}_{\text{2}}}$

This molecule is composed of one carbon and two oxygen atoms but is symmetrical in nature so dipole moment gets cancelled out and therefore ${\text{C}}{{\text{O}}_{\text{2}}}$ is non-polar in nature (For structure, refer to the attached image).

(3) ${\text{C}}{{\text{H}}_{\text{4}}}$

This molecule consists of one carbon and four hydrogen atoms but is symmetrical in nature so dipole moment gets cancelled out and therefore ${\text{C}}{{\text{H}}_{\text{4}}}$ is non-polar in nature (For structure, refer to the attached image).

(4)

${\text{N}}{{\text{H}}_{\text{3}}}$

This molecule is composed of one nitrogen and three hydrogen atoms. But N is more electronegative than H so this is polar molecular due to electronegativity difference. Also, this is unsymmetrical molecule (For structure, refer to the attached image) and therefore it is polar in nature.

Learn more:

Identification of ionic bonding: Which is a covalent compound?

Answer details:

Grade: High School

Subject: Chemistry

Chapter: Ionic and covalent compounds

Keywords: polar, non-polar, CH4, CO2, Br2, NH3, symmetrical, dipole moment, chemical bond, ionic bond, covalent bond.

Which formula represents a polar molecule? (1) br2 (3) ch4 (2) co2 (4) nh3

Answer from: Quest

The third choice .. (:

Answer from: Quest

The activity series is shown in the attached picture. if the element is below the other, then you can displace the other. following the activity series as a guide, the reactions are as follows: nickel and aluminum chloride3 ni + 2 alcl₃ → 3 nicl₂ + 2 albarium and copper bromideba + cubr → no reaction because cu is less oxidizable than bapotassium nitrate and aluminum3 kno₃ + al → al(no₃)₃ + 3 ksodium phosphate and zincnaso₄ + zn → znso₄ + na

Another question on Chemistry

Chemistry, 21.06.2019 19:30

Si una estrella no tiene paralaje medible, ¿qué puedes inferir?

Answers: 1

Answer

Chemistry, 22.06.2019 06:30

(1.6 × 10-19)(5.0 × 106) = c × 10d identify the missing numbers below to show the result of multiplying the numbers.

Answers: 1

Answer

Chemistry, 22.06.2019 12:00

Why are people not able to skip a dive to the deepest part of the ocean

Answers: 1

Answer

Chemistry, 22.06.2019 14:50

The table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 9 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of tthe table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 9 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

Answers: 3

Answer

You know the right answer?

Which formula represents a polar molecule?
(1) br2 (3) ch4
(2) co2 (4) nh3...

Questions