What is the mass of 6.02 x 10^23 atoms of arsenic?

Mass = 74.9 g

Explanation:

Given dа ta:

Number of atoms of arsenic = 6.02*10²³ atoms

Mass of arsenic = ?

Solution:

The given problem will solve by using Avogadro number.

It is the number of atoms, ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

The number 6.022 * 10²³ is called Avogadro number.

one mole = 6.02*10²³ atoms

So number of moles of arsenic are 1 mol.

Mass of arsenic:

Mass = number of moles * molar mass

Mass = 1 mol * 74.9 g/mol

Mass = 74.9 g