What is the number of silver atoms in a 10.8 g sample?

Solution:

To solve this problem, we write down the formula for calculating the number of atoms.

v = N / NA

N = v * NA

N is the number of atoms or molecules.

v is the amount of substance.

NA – Avogadro’s constant (6.02 * 10 ^ (23) mol ^ (- 1))

Let’s calculate the amount of substance according to the formula:

v = m / M

Let’s calculate the molar mass of silver.

M (Ag) = 108 g / mol

Let’s substitute the data into the formula and make the calculation.

v = 10.8 g / 108 g / mol = 0.1 mol

Let’s calculate the number of atoms.

N = 0.1 mol * 6.02 * 10 ^ (23) mol ^ (- 1) = 0.602 * 10 ^ (23)

Answer: 0.602 * 10 ^ (23)