Chemistry, 30.08.2019 20:20 keilajohnson810

Which of the following molecules are polar? a) cbr44 + b) so3 c) xef4 d) cifs e) pbr

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Answer from: Jennitiu

Option (d) is the correct answer.

Explanation:

$CBr_{4}$ has a tetrahedral structure and since, bromine is more electronegative than carbon atom. So, each bromine atom will pull the electrons more towards itself.

As a result, dipole moment will cancel out each other. Therefore, $CBr_{4}$ molecule will be non-polar in nature.

$SO_{3}$ has trigonal planar geometry and oxygen atom being more electronegative in nature than sulfur atom will attract the electrons more towards itself.

Hence, dipole moment will be cancelled out. Therefore, $SO_{3}$ molecule is non-polar in nature.

$XeF_{4}$ has square planar geometry and fluorine atom being more electronegative in nature than xenon atom will attract the electrons more towards itself.

Hence, dipole moment will be cancelled out. Therefore, $XeF_{4}$ molecule is non-polar in nature.

$ClF_{5}$ has square pyramidal geometry and fluorine atom being more electronegative in nature than xenon atom will attract the electrons more towards itself.

There will be an unpaired dipole moment that doesn't get cancelled out. Hence, $ClF_{5}$ molecule will be polar in nature.

$PBr_{5}$ has trigonal bipyramidal geometry and bromine atom being more electronegative in nature than phosphorous atom will attract the electrons more towards itself.

Hence, dipole moment will be cancelled out. Therefore, $PBr_{5}$ molecule is non-polar in nature.

Thus, we can conclude that out of the given options $ClF_{5}$ is polar in nature.

Answer from: Quest

it should be all of them because it asks if you included all of those in your answer

explanation:

Answer from: Quest

the balanced equation for reaction of ca metal with o2 to produce cao is as below

2 ca+ o2→ 2 cao2

explanation

the reaction is balanced since the number of atoms in reactant side is equal to number of atoms in product side. for example they are 2 atom of ca in reactant side and 2 atoms of ca in the product side.

the process is a meet the requirement of redox reaction because : calcium is oxidized from oxidation state 0 to 2+ while oxygen is reduced from oxidation state 0 to 2-

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