All categories

2 years ago

The lewis structure of pf3 shows that the central phosphorus atom has nonbonding and bonding electron pair(s)

Chemistry

2 answers:

vfiekz [6]2 years ago

6 0

The Lewis structure of PF3 shows that the central phosphorus atom has one non bonding and three bonding electron pairs. In this compound each Phosphorus atom contributes 5 valence electrons while each fluoride contributes 7 valence electrons making a total of 26 valence electrons. The central Phosphorus atom forms single bonds with each of the fluoride atoms. Phosphorus, therefore ends up with a non-bonding pair since the fluoride atoms already have 8 electrons around them.

ElenaW [278]2 years ago

5 0

Answer : The Lewis structure of $PF_3$ shows that the central phosphorus atom has 1 non-bonding and 3 bonding electron pair(s).

Explanation :

Lewis-dot structure : It shows the bonding between the atoms of a molecule and it also shows the unpaired electrons present in the molecule.

The number of valence electrons are shown by 'dot'.

The given molecule is, phosphorous trifluoride.

As we know that phosphorous has '5' valence electrons and fluorine has '7' valence electrons.

Therefore, the total number of valence electrons in phosphorous trifluoride, $PF_3$ = 5 + 3(7) = 26

According to electron-dot structure, there are 6 number of bonding electrons and 20 number of non-bonding electrons.

The Lewis structure of $PF_3$ shows that the central phosphorus atom has 1 non-bonding and 3 bonding electron pair(s).

The Lewis-dot structure of $PF_3$ is shown below.

You might be interested in

Dry ice is solid carbon dioxide. A 0.050-g sample of dry ice is placed in an evacuated 4.6-L vessel at 30 °C. Calculate the pres

goldenfox [79]

The answer is 6.1*10^-3 atm.

The pictures and explanations are there.

3 0

2 years ago

Which statement best describes the relationship between igneous and metamorphic rocks?

solong [7]

Answer:

Igneous rocks must go through the sedimentary process to change into metamorphic rocks. Igneous rocks are chemically changed into metamorphic rocks because of high temperature and pressure. Metamorphic rocks are formed from melting igneous rocks. Metamorphic rocks and igneous rocks do not follow a rock cycle.

Explanation:

hope this helps!

6 0

2 years ago

Read 2 more answers

. Calculate the mass of O2 produced if 3.450 g potassium chlorate is completely decomposed by heating in presence of a catalyst

Vesnalui [34]

2 KClO3(s) → 3 O2(g) + 2 KCl(s)

Note: MnO2 (Manganese Dioxide) is not part of the reaction. A catalyst lowers the activation energy and increases both forward and reverse reactions at equal rates.

molar mass of KClO3 = 122.5
Moles of KClO3 = 3.45 / 122.55 = 0.028

Moles of O2 produce = $\frac{3}{2} \times 0.028$

= 0.042 moles

molar mass of O2 = 32

so, mass of O2 = 32 x 0.042 = 1.35 g

5 0

2 years ago

Read “The Ozone Hole” and answer the question below. List at least three scientific disciplines related to chemistry mentioned o

kirill115 [55]

Answer:

Choose any of these and it should be correct:

-atmospheric science

-environmental science

-climate science

-biology

-astronomy

-human physiology and medicine

Explanation:

I just had this question on edgenuity, this is what came up as correct. I hope this helps

4 0

2 years ago

Read 2 more answers

Be sure to answer all parts. ΔH o f of hydrogen chloride [HCl(g)] is −92.3 kJ/mol. Given the following data, determine the ident

Akimi4 [234]

Answer:

NH₄Cl(s) → NH₃(g) + HCl(g)

ΔH°rxn 74,89 kJ/mol

Explanation:

The change in enthalpy of formation (ΔHf) is defined as the change in enthalpy in the formation of a substance from its constituent elements. For HCl(g):

(1) ¹/₂H₂(g) + ¹/₂ Cl₂ → HCl(g) ΔH = -92,3 kJ/mol

It is possible to sum ΔH of different reactions to obtain ΔH of a global reaction (Hess's law).

For the reactions:

(2) N₂(g) + 4H₂(g) + Cl₂(g) → 2NH₄Cl(s) ΔH°rxn = −630.78 kJ/mol

(3) N₂(g) + 3H₂(g) → 2NH₃(g) ΔH°rxn = −296.4 kJ/mol

The sum of -(2) + (3) gives:

-(2) 2NH₄Cl(s) → N₂(g) + 4H₂(g) + Cl₂(g) ΔH°rxn = +630.78 kJ/mol

(3) N₂(g) + 3H₂(g) → 2NH₃(g) ΔH°rxn = −296.4 kJ/mol

-(2) + (3) 2NH₄Cl(s) → 2NH₃(g) + H₂(g) + Cl₂(g)

ΔH°rxn = +630.78 kJ/mol −296.4 kJ/mol = +334,38 kJ/mol

Now, the sum of -(2) + (3) + 2×(1)

-(2) + (3) 2NH₄Cl(s) → 2NH₃(g) + H₂(g) + Cl₂(g) ΔH°rxn = +334,38 kJ/mol

2×(1) H₂(g) + Cl₂(g)→ 2HCl(g) ΔH = 2×-92,3 kJ/mol

-(2) + (3) + 2×(1) 2NH₄Cl(s) → 2NH₃(g) + 2HCl(g)

ΔH°rxn = +334,38 kJ/mol + 2×-92,3 kJ/mol = 149,78 kJ/mol

The reaction of:

NH₄Cl(s) → NH₃(g) + HCl(g)

Has ΔH°rxn = 149,78kJ/mol / 2 = 74,89 kJ/mol

I hope it helps!

8 0

2 years ago

The lewis structure of pf3 shows that the central phosphorus atom has ________ nonbonding and ________ bonding electron pair(s)

The lewis structure of pf3 shows that the central phosphorus atom has nonbonding and bonding electron pair(s)