(a) Calculate the number of electrons in a small, electrically neutral silver pin that has a mass of 7.0 g. Silver has 47 electrons per atom, and its molar mass is 107.87 g/mol.

The number of electrons in given amount of silver are

Explanation:

The number of moles is defined as the ratio of the mass of a substance to its molar mass.

The equation used is:

......(1)

We are given:

Mass of silver = 7.0 g

Molar mass of silver = 107.87 g/mol

Putting values in equation 1:

According to the mole concept:

1 mole of a compound contains number of particles.

Number of electrons per atom of silver = 47

So, 0.065 moles of silver will contain = number of electrons

Hence, the number of electrons in given amount of silver are