g The electronic structure of which ONE of the following species cannot be adequately described by a single Lewis formula? (In other words, the electronic structure of which one can only be described by drawing two or more resonance structures?) A) C2H4 B) SO3 2– C) SO3 D) C3H8 E) HCN


Answer 1


C) SO3


Lewis formula shows the bonding between atoms of a molecule and expresses the lone pair present in the atoms.

SO3 or Sulfur trioxide cannot be adequately described by a single Lewis formula because it has majorly 3 resonance structures because Sulfur does not follow the octet rule and can expand electrons in its outer shell.

Hence, the correct answer is C) SO3

Answer 2

Final answer:

SO3, or Sulfur Trioxide, is the molecule whose electronic structure requires the depiction of multiple resonance structures for adequate description. The rest of the species can be represented with a single Lewis structure.


The electronic structure that can only be described by drawing two or more resonance structures is SO3 (Sulfur Trioxide). This molecule has 24 valence electrons having a central atom with expanded octet. The Lewis structure is drawn in a way that three resonance structures are needed to represent the bonding in this molecule adequately. On the other hand, the rest of the species given in the options can be described using a single Lewis formula.

Learn more about Resonance Structures here:



Related Questions

Which of the following required Bohr's model of the atom to need modification ? A. Energies of electrons are quantized. B. Quantized electron energies are responsible for emission spectra lines. C. An electron's energy increases the farther it moves from the nucleus. D. Electrons do not follow circular orbits around the nucleus..
100.0 mL of Ca(OH)2 solution is titrated with 5.00 x 10–2 M HBr. It requires 36.5 mL of the acid solution for neutralization. What is the number of moles of HBr used, and the concentration of the Ca(OH)2 solution, respectively?
How many grams of NaCl are produced when 0.548 moles of Na react with excess Cl2 according to the reaction above?2Na + Cl2 --> 2NaCl
Ri1. Among these which is the example of compound?a) sulphurb) ironc) ammoniader​
Vinegar, the commercial name for acetic acid, HC2Hs02, is a monoprotic organic acid. A 5% (w/v) solution of vinegar is used to titrate a sample of an antacid that contains CaCO3 is the only basic component. If one antacid tablet contains 800 mg of CaCOs in it, then calculate how many milliliters of vinegar should be required to completely neutralize the CaCO3 present in one tablet of antacid?

Calculate the concentration of OH in a solution that contains 3910-4 M H30 at 25°C. Identify the solution as acidic, basic or neutral OA) 2.6 10-11 M, acidic OB)26 10-11 M. basic O c) 3.9 x 10-4 M, neutral OD) 2.7 * 10-2 M


Answer : The correct option is, (A) 2.6* 10^(-11)M, acidic


pH : It is defined as the negative logarithm of hydrogen ion or hydronium ion concentration.

When the value of pH is less then 7 then the solution will be acidic.

When the value of pH is more then 7 then the solution will be basic.

When the value of pH is equal to 7 then the solution will be neutral.

First we have to calculate the pH.

pH=-\log [H^+]

pH=-\log (3.9* 10^(-4))


Now we have to calculate the pOH.


Now we have to calculate the OH^- concentration.

pOH=-\log [OH^-]

10.59=-\log [OH^-]

[OH^-]=2.6* 10^(-11)M

Therefore, the OH^- concentration is, 2.6* 10^(-11)M

How many H atoms in Mg(OH)2




There are 2.

How is energy transfer connected to your life



Baking, microwave, heating system for your house, water boiler, fridge.

Jaxson needs to react 16.3 moles of copper (II) nitrate, Cu(NO3)2, in a chemical reaction. How many grams of crystalsdoes he need to weigh out?





Problem here is to find the mass of Cu(NO₃)₂ to weigh out to make for the number of moles.


Number of moles  = 16.3moles


Mass of Cu(NO₃)₂ = ?


To find the mass of Cu(NO₃)₂, use the expression below;

    Mass of Cu(NO₃)₂ = number of moles x molar mass

Let's find the molar mass;

  Cu(NO₃)₂ = 63.5 + 2[14 + 3(16)]

                    = 63.5 + 2(62)

                    = 187.5g/mol

Mass of  Cu(NO₃)₂ = 16.3 x 187.5  = 3056.25g

Which of the following are lost or gained during a nuclear reaction?Group of answer choices

Electrons and nucleus

Protons and electrons

Electrons and neutrons

Protons and neutrons



Protons and neutrons :)


I think that is electrons and nucleus


It makes sense

Exactly 1.5 g of a fuel burns under conditions of constant pressure and then again under conditions of constant volume. In measurement A the reaction produces 25.9 kJ of heat , and in measurement B the reaction produces 23.3 kJ of heat. Which measurement (A or B) corresponds to conditions of constant pressure? Which one corresponds to conditions of constant volume? Explain.



Process B : constant pressure condition

Process A : constant volume condition


In case of constant pressure, some of the energy is used to do work on the surrounding to keep pressure constant. Due to this, the total heat energy is less than in case of constant volume. In Case of constant Volume all of heat is available, produced in reaction because no work is done.

If we look at our data,we will find that process B has energy 23.3 KJ which is less than process A, the energy of which is 25.9 KJ. It means Process B is occurred at constant pressure condition and Process A has occurred at constant volume condition