The mass of 1 mole of atoms is equal to the molar mass of the substance. Molar mass is the mass of one mole of a substance and is expressed in grams per mole (g/mol).
To determine the mass of 1 mole of atoms, you need to sum up the atomic masses of all the atoms present in one mole of the substance. This can be done by referring to the periodic table and finding the atomic masses of the individual atoms.
For example, let's consider sodium (Na). The atomic mass of sodium is approximately 22.99 atomic mass units (amu) or 22.99 grams per mole (g/mol). This means that 1 mole of sodium atoms has a mass of approximately 22.99 grams.
Similarly, for other elements, you would calculate the mass of 1 mole of atoms by summing up the atomic masses of all the atoms in the formula unit of the substance.
It's important to note that the concept of molar mass applies to all substances, not just individual elements. For compounds, you would calculate the molar mass by summing up the atomic masses of all the atoms in the formula unit of the compound.