Question

Give the total number of valence electrons in each of the following molecules. a. \(\mathrm{CBr}_{4}\) b. \(\mathrm{NO}_{2}\) c. \(C_{6} H_{6}\) d. \(\mathrm{H}_{2} \mathrm{O}_{2}\)

Short answer

The total number of valence electrons in each molecule are as follows: a. \(\mathrm{CBr}_{4}\): 32 valence electrons b. \(\mathrm{NO}_{2}\): 17 valence electrons c. \(C_{6} H_{6}\): 30 valence electrons d. \(\mathrm{H}_{2} \mathrm{O}_{2}\): 14 valence electrons

Step-by-step solution

Identify the valence electrons of each atom in the molecule

First, we need to identify the number of valence electrons for each atom in the molecule. Carbon (C) has 4 valence electrons, and bromine (Br) has 7 valence electrons.

Calculate the total valence electrons

Now, we can calculate the total valence electrons in the molecule by adding the valence electrons of each atom, multiplied by the number of atoms in the molecule: \(1 \times 4 + 4 \times 7 = 4 + 28 = 32\). Therefore, there are 32 valence electrons in \(\mathrm{CBr}_{4}\). #b. \(\mathrm{NO}_{2}\)#

Identify the valence electrons of each atom in the molecule

For this molecule, nitrogen (N) has 5 valence electrons, and oxygen (O) has 6 valence electrons.

Calculate the total valence electrons

We can calculate the total valence electrons in the molecule by adding the valence electrons of each atom, multiplied by the number of atoms in the molecule: \(1 \times 5 + 2 \times 6 = 5 + 12 = 17\). Therefore, there are 17 valence electrons in \(\mathrm{NO}_{2}\). #c. \(C_{6} H_{6}\)#

Identify the valence electrons of each atom in the molecule

In this molecule, carbon (C) has 4 valence electrons, and hydrogen (H) has 1 valence electron.

Calculate the total valence electrons

We can calculate the total valence electrons in the molecule by adding the valence electrons of each atom, multiplied by the number of atoms in the molecule: \(6 \times 4 + 6 \times 1 = 24 + 6 = 30\). Therefore, there are 30 valence electrons in \(C_{6} H_{6}\). #d. \(\mathrm{H}_{2} \mathrm{O}_{2}\)#

Identify the valence electrons of each atom in the molecule

For this molecule, hydrogen (H) has 1 valence electron, and oxygen (O) has 6 valence electrons.

Calculate the total valence electrons

We can calculate the total valence electrons in the molecule by adding the valence electrons of each atom, multiplied by the number of atoms in the molecule: \(2 \times 1 + 2 \times 6 = 2 + 12 = 14\). Therefore, there are 14 valence electrons in \(\mathrm{H}_{2} \mathrm{O}_{2}\).