1. Convert atoms to moles:
* Avogadro's number tells us there are 6.022 x 10²³ atoms in one mole of any substance.
* Divide the number of atoms by Avogadro's number to find the number of moles:
2980 atoms / (6.022 x 10²³ atoms/mol) = 4.95 x 10⁻²¹ moles
2. Calculate the mass:
* The molar mass of sodium (Na) is 22.99 g/mol.
* Multiply the number of moles by the molar mass to find the mass in grams:
(4.95 x 10⁻²¹ moles) * (22.99 g/mol) = 1.14 x 10⁻¹⁹ grams
Therefore, the mass of a sodium sample containing 2980 atoms is approximately 1.14 x 10⁻¹⁹ grams.
