Question 1

Use the bond energies provided to complete the following statement. ________ when all of the bonds in acetic acid (CH₃COOH)are broken. Bond Bond Energy (kJ/mol) C-H 413 C-O 358 O-H 463 C=O 745 C-C 348 C=C 614 A)3153 kJ/mol of energy is consumed B)3153 kJ/mol of energy is released C)2805 kJ/mol of energy is released D)2805 kJ/mol of energy is consumed E)2766 kJ/mol of energy is consumed

Accepted Answer

DTo calculate the energy consumed when all the bonds in acetic acid are broken, we need to sum the bond energies for each type of bond present in the molecule. Acetic acid has the formula CH3COOH, which includes the following bonds: 3 C-H, 1 C=O (double bond), 1 C-O, and 1 O-H. Using the provided bond energies:- 3 C-H bonds: 3 * 413 kJ/mol = 1239 kJ/mol- 1 C=O bond: 1 * 745 kJ/mol = 745 kJ/mol- 1 C-O bond: 1 * 358 kJ/mol = 358 kJ/mol- 1 O-H bond: 1 * 463 kJ/mol = 463 kJ/molAdding these energies together gives: 1239 + 745 + 358 + 463 = 2805 kJ/mol. However, there's no option matching this exact calculation. It seems there might have been a misunderstanding in the bond count or types, especially since acetic acid also contains a C-C bond not accounted for in the calculation. Given the options and the typical approach to such a problem, the correct answer would involve calculating the total energy based on the bonds present. However, without accounting for a C-C bond (which is present between the methyl group and the carboxyl group), the calculation is off. Since none of the calculations exactly match the expected sum based on the provided bond energies and the typical structure of acetic acid, and considering the options given, there seems to be a mistake in the calculation or in the interpretation of the options. Given the bond energies and the typical approach, one would calculate the energy required to break all bonds, but the correct answer should be based on the total bond energies provided. The misunderstanding seems to stem from an incorrect bond count or overlooking the presence of a C-C bond in the initial calculation.

Question 2

How is a covalent bond formed?
A)By the sharing of valence protons between atoms
B)By the sharing of positrons between atoms
C)​By the sharing of a pair of electrons between atoms
D)​By the sharing of boson particles between atoms
E)​By the sharing of a pair of neutrons between atoms

Accepted Answer

A covalent bond is formed by the sharing of a pair of electrons between atoms. This sharing allows each atom to fill its outermost valence shell and achieve greater stability. A covalent bond can be thought of as a balance between the attractive forces of the shared electrons and the repulsive forces between the positively charged atomic nuclei. Valence protons, positrons, boson particles, and neutrons are not involved in the formation of covalent bonds.

Question 3

Which of the following covalent molecules does not have the proper Lewis dot formula?
A) 
B) 
C) 
D) 
E)

Accepted Answer

The answer of Which of the following covalent molecules does...

Question 4

The energy that must be added to separate the atoms in a molecule is called the _____.
A)​electric potential energy
B)​elastic potential energy
C)​gravitational potential energy
D)​ionization energy
E)​bond dissociation energy

Accepted Answer

The energy required to separate the atoms in a molecule is known as the bond dissociation energy. This energy quantifies the strength of the chemical bond between atoms in a molecule.

Question 5

The normal distance between nuclei of two bonded atoms in a molecule is called _____.
A)​bond length
B)​focal length
C)​bar length
D)​dipole length
E)​arc length

Accepted Answer

The normal distance between nuclei of two bonded atoms in a molecule is called bond length. This is the distance at which the attractive forces between the two nuclei and the bonding electrons are balanced.

Quiz 9: Ionic and Covalent Bonding

Use the bond energies provided to complete the following statement. ________ when all of the bonds in acetic acid (CH₃COOH) are broken. Bond Bond Energy (kJ/mol) C-H 413 C-O 358 O-H 463 C=O 745 C-C 348 C=C 614

How is a covalent bond formed?

Which of the following covalent molecules does not have the proper Lewis dot formula?

The energy that must be added to separate the atoms in a molecule is called the _____.

The normal distance between nuclei of two bonded atoms in a molecule is called _____.